Release 4B 5

This page is part of the FHIR Specification (v4.3.0: R4B (v5.0.0: R5 - STU ). The This is the current published version which supercedes in it's permanent home (it will always be available at this version is 5.0.0 . URL). For a full list of available versions, see the Directory of published versions . Page versions: R5 R4B R5 R4B R4 R3 R2

Structuredefinition.profile.xml

Example StructureDefinition/StructureDefinition (XML)

FHIR Infrastructure Work Group Maturity Level : N/A Standards Status : Informative Compartments : Not linked to any No defined compartments

Raw XML ( canonical form + also see XML Format Specification )

Jump past Narrative

StructureDefinition for structuredefinition

<?xml version="1.0" encoding="UTF-8"?>


  
  
    
  
  
    
    
      
        
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            StructureDefinition : A definition of a FHIR structure. This resource is used to describe
             the underlying resources, data types defined in FHIR, and also for describing extensions
             and constraints on resources and data types.
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            padding-left: 3px; padding-right: 3px; border: 1px grey solid; font-weight: bold; color:
             black; background-color: #e6ffe6
          
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           padding:0px 4px 0px 4pxStructural Definition
            
            + Warning: Name should be usable as an identifier for the module by machine processing
               applications such as code generation
            
            
            
            + Rule: If the first element in a differential has no &quot;.&quot; in the path and it's
               not a logical model, it has no type
            
            
            
            
            
            
            

<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="StructureDefinition"/> 
  <meta> 
    <lastUpdated value="2023-03-26T15:21:02.749+11:00"/> 
  </meta> 
  <text> 
    <status value="generated"/> 
    <div xmlns="http://www.w3.org/1999/xhtml">
      <table border="0" cellpadding="0" cellspacing="0" style="border: 0px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align:
       top;">
        <tr style="border: 1px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align:

         top">
          <th class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="The logical name of the element">Name</a>           </th>           <th class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Information about the use of the element">Flags</a>           </th>           <th class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Minimum and Maximum # of times the the element can appear in the instance">Card.</a>           </th>           <th class="hierarchy" style="width: 100px">            <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Reference to the type of the element">Type</a>           </th>           <th class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Additional information about the element">Description &amp; Constraints</a>             <span style="float: right">              <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format">                <img alt="doco" src="data:(snipped in html view)" style="background-color: inherit"/>               </a>             </span>           </th>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Resource"/>              <span title="StructureDefinition : A definition of a FHIR structure. This resource is used to

             describe the underlying resources, data types defined in FHIR, and also for describing
             extensions and constraints on resources and data types.">StructureDefinition</span> 
            <a name="StructureDefinition"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="versions.html#std-process" style="padding-left: 3px; padding-right: 3px; border: 1px grey solid; font-weight: bold;

             color: black; background-color: #e6ffe6" title="Standards Status = Normative">N</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px"/> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="domainresource.html">DomainResource</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Structural Definition
            <br/>              <span style="font-style: italic" title="cnl-0">+ Warning: Name should be usable as an identifier for the module by machine processing

               applications such as code generation</span> 
            <br/>              <span style="font-style: italic" title="sdf-1">+ Rule: Element paths must be unique unless the structure is a constraint</span>             <br/>              <span style="font-style: italic" title="sdf-4">+ Rule: If the structure is not abstract, then there SHALL be a baseDefinition</span>             <br/>              <span style="font-style: italic" title="sdf-5">+ Rule: If the structure defines an extension then the structure must have context

               information</span> 
            <br/>              <span style="font-style: italic" title="sdf-6">+ Rule: A structure must have either a differential, or a snapshot (or both)</span>             <br/>              <span style="font-style: italic" title="sdf-11">+ Rule: If there's a type, its content must match the path name in the first element

               of a snapshot</span> 
            <br/>              <span style="font-style: italic" title="sdf-14">+ Rule: All element definitions must have an id</span>             <br/>              <span style="font-style: italic" title="sdf-15">+ Rule: The first element in a snapshot has no type unless model is a logical model.</span>             <br/>              <span style="font-style: italic" title="sdf-15a">+ Rule: If the first element in a differential has no &quot;.&quot; in the path

               and it's not a logical model, it has no type</span> 
            <br/>  
            <span style="font-style: italic" title="sdf-9">+ Rule: In any snapshot or differential, no label, code or requirements on an element
               without a &quot;.&quot; in the path (e.g. the first element)
            
            + Rule: If there's a type, its content must match the path name in the first element of
               a snapshot
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            Elements defined in Ancestors: 
            The logical id of the resource, as used in the URL for the resource. Once assigned, this
             value never changes., 

               without a &quot;.&quot; in the path (e.g. the first element)</span> 
            <br/>              <span style="font-style: italic" title="sdf-16">+ Rule: All element definitions must have unique ids (snapshot)</span>             <br/>              <span style="font-style: italic" title="sdf-17">+ Rule: All element definitions must have unique ids (diff)</span>             <br/>              <span style="font-style: italic" title="sdf-18">+ Rule: Context Invariants can only be used for extensions</span>             <br/>              <span style="font-style: italic" title="sdf-19">+ Rule: FHIR Specification models only use FHIR defined types</span>             <br/>              <span style="font-style: italic" title="sdf-21">+ Rule: Default values can only be specified on specializations</span>             <br/>              <span style="font-style: italic" title="sdf-22">+ Rule: FHIR Specification models never have default values</span>             <br/>              <span style="font-style: italic" title="sdf-23">+ Rule: No slice name on root</span>             <br/>              <span style="font-style: italic" title="sdf-27">+ Rule: If there's a base definition, there must be a derivation </span>             <br/>              <span style="font-style: italic" title="sdf-29">+ Warning: Elements in Resources must have a min cardinality or 0 or 1 and a max

               cardinality of 1 or *</span> 
            <br/>              <br/>  Elements defined in Ancestors:             <a href="resource.html#Resource" title="The logical id of the resource, as used in the URL for the resource. Once assigned,

             this value never changes.">id</a> , 

            <a href="resource.html#Resource" title="The metadata about the resource. This is content that is maintained by the infrastructure.
             Changes to the content might not always be associated with version changes to the resource., 
            A reference to a set of rules that were followed when the resource was constructed, and
             which must be understood when processing the content. Often, this is a reference to an
             implementation guide that defines the special rules along with other profiles etc., 
            , 
            A human-readable narrative that contains a summary of the resource and can be used to
             represent the content of the resource to a human. The narrative need not encode all the
             structured data, but is required to contain sufficient detail to make it &quot;clinically
             safe&quot; for a human to just read the narrative. Resource definitions may define what
             content should be represented in the narrative to ensure clinical safety., 
            These resources do not have an independent existence apart from the resource that contains
             them - they cannot be identified independently, and nor can they have their own independent
             transaction scope., 

             Changes to the content might not always be associated with version changes to the
             resource.">meta</a> , 
            <a href="resource.html#Resource" title="A reference to a set of rules that were followed when the resource was constructed,

             and which must be understood when processing the content. Often, this is a reference
             to an implementation guide that defines the special rules along with other profiles
             etc.">implicitRules</a> , 
            <a href="resource.html#Resource" title="The base language in which the resource is written.">language</a> ,             <a href="domainresource.html#DomainResource" title="A human-readable narrative that contains a summary of the resource and can be used

             to represent the content of the resource to a human. The narrative need not encode
             all the structured data, but is required to contain sufficient detail to make it
             &quot;clinically safe&quot; for a human to just read the narrative. Resource definitions
             may define what content should be represented in the narrative to ensure clinical
             safety.">text</a> , 
            <a href="domainresource.html#DomainResource" title="These resources do not have an independent existence apart from the resource that

             contains them - they cannot be identified independently, nor can they have their
             own independent transaction scope. This is allowed to be a Parameters resource
             if and only if it is referenced by a resource that provides context/meaning.">contained</a> , 

            <a href="domainresource.html#DomainResource" title="May be used to represent additional information that is not part of the basic definition
             of the resource. To make the use of extensions safe and manageable, there is a strict
             set of governance  applied to the definition and use of extensions. Though any implementer
             can define an extension, there is a set of requirements that SHALL be met as part of the
             definition of the extension., 

             of the resource. To make the use of extensions safe and managable, there is a strict
             set of governance applied to the definition and use of extensions. Though any implementer
             can define an extension, there is a set of requirements that SHALL be met as part
             of the definition of the extension.">extension</a> , 

            <a href="domainresource.html#DomainResource" title="May be used to represent additional information that is not part of the basic definition
             of the resource and that modifies the understanding of the element that contains it and/or
             the understanding of the containing element's descendants. Usually modifier elements provide
             negation or qualification. To make the use of extensions safe and manageable, there is
             a strict set of governance applied to the definition and use of extensions. Though any
             implementer is allowed to define an extension, there is a set of requirements that SHALL
             be met as part of the definition of the extension. Applications processing a resource
             are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource
             (including cannot change the meaning of modifierExtension itself).
          
        

        
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            StructureDefinition.url : An absolute URI that is used to identify this structure definition
             when it is referenced in a specification, model, design or an instance; also called its
             canonical identifier. This SHOULD be globally unique and SHOULD be a literal address at
             which at which an authoritative instance of this structure definition is (or will be)
             published. This URL can be the target of a canonical reference. It SHALL remain the same
             when the structure definition is stored on different servers.
            
          
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           solid; padding:0px 4px 0px 4px
            
          
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            StructureDefinition.identifier : A formal identifier that is used to identify this structure
             definition when it is represented in other formats, or referenced in a specification,
             model, design or an instance.
            
          
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          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4pxAdditional identifier for the structure definition
            
          
        

        
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            /2VzQwoCY4iWbZSmo1QGoUgNMghvWaIejPQW/CrrNCylIwcOCDYfLNRcNer4SAAAAAElFTkSuQmCC
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAACXBIWXMAAAsTAAALEwEAmpwYAAAARk
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            RgwAAAABJRU5ErkJggg== 
            StructureDefinition.version : The identifier that is used to identify this version of
             the structure definition when it is referenced in a specification, model, design or instance.
             This is an arbitrary value managed by the structure definition author and is not expected
             to be globally unique. For example, it might be a timestamp (e.g. yyyymmdd) if a managed
             version is not available. There is also no expectation that versions can be placed in
             a lexicographical sequence.
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
        

        
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVBORw0KGg
          oAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAL0lEQVR42u3XsQ0AQAgCQHdl/xn8jxvYWB3JlTR0VJLa+OltBwAAYP6EEQAAgCs
          PVYVAgIJrA/sAAAAASUVORK5CYII=)
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
            RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAwN
            dCABMPwMo2ctnoQAAAABJRU5ErkJggg==
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
            RJTUUH3wYeFzI3XJ6V3QAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+2RsQ0AIAzDav7
            /2VzQwoCY4iWbZSmo1QGoUgNMghvWaIejPQW/CrrNCylIwcOCDYfLNRcNer4SAAAAAElFTkSuQmCC
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAACXBIWXMAAAsTAAALEwEAmpwYAAAARk
            lEQVQ4y2P8//8/AyWAhYFCMAgMuHjx4n+KXaCv+I0szW8WpCG8kFO1lGFKW/SIjAUYgxz/MzAwMDC+nqhDUTQyjuYFBgCNmhP4OvT
            RgwAAAABJRU5ErkJggg== 

             of the resource and that modifies the understanding of the element that contains
             it and/or the understanding of the containing element's descendants. Usually modifier
             elements provide negation or qualification. To make the use of extensions safe
             and managable, there is a strict set of governance applied to the definition and
             use of extensions. Though any implementer is allowed to define an extension, there
             is a set of requirements that SHALL be met as part of the definition of the extension.
             Applications processing a resource are required to check for modifier extensions.
Modifier extensions SHALL NOT change the meaning of any elements on Resource or
             DomainResource (including cannot change the meaning of modifierExtension itself).">modifierExtension</a> 
            <br/>              <span title="uml.html#interfaces">Interfaces Implemented: </span>             <a href="canonicalresource.html#CanonicalResource" title="Common Interface declaration for conformance and knowledge artifact resources.">CanonicalResource</a>           </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAw
          EwfT6/ddA0GBAxO3NrLlKUj9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.url : An absolute URI that is used to identify this structure

             definition when it is referenced in a specification, model, design or an instance;
             also called its canonical identifier. This SHOULD be globally unique and SHOULD
             be a literal address at which an authoritative instance of this structure definition
             is (or will be) published. This URL can be the target of a canonical reference.
             It SHALL remain the same when the structure definition is stored on different servers.">url</span> 
            <a name="StructureDefinition.url"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">1..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#uri">uri</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Canonical identifier for this structure definition, represented as a URI (globally
             unique)
            <br/>              <span style="font-style: italic" title="cnl-1">+ Warning: URL should not contain | or # - these characters make processing canonical

               references problematic</span> 
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAwEwfT6/ddA0GBAxO3NrLlKUj
          9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Data Type"/>              <span title="StructureDefinition.identifier : A formal identifier that is used to identify this

             structure definition when it is represented in other formats, or referenced in
             a specification, model, design or an instance.">identifier</span> 
            <a name="StructureDefinition.identifier"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#Identifier">Identifier</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Additional identifier for the structure definition
            <br/>              <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAw
          EwfT6/ddA0GBAxO3NrLlKUj9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.version : The identifier that is used to identify this version

             of the structure definition when it is referenced in a specification, model, design
             or instance. This is an arbitrary value managed by the structure definition author
             and is not expected to be globally unique. There is no expectation that versions
             can be placed in a lexicographical sequence, so authors are encouraged to populate
             the StructureDefinition.versionAlgorithm[x] element to enable comparisons. If there
             is no managed version available, authors can consider using ISO date/time syntax
             (e.g., '2023-01-01').">version</span> 
            <a name="StructureDefinition.version"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#string">string</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Business version of the structure definition
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAwEwfT6/ddA0GBAxO3NrLlKUj
          9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Choice of Types"/>              <span title="StructureDefinition.versionAlgorithm[x] : Indicates the mechanism used to compare

             versions to determine which is more current.">versionAlgorithm[x]</span> 
            <a name="StructureDefinition.versionAlgorithm_x_"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="versions.html#std-process" style="padding-left: 3px; padding-right: 3px; border: 1px grey solid; font-weight: bold;

             color: black; background-color: #fff5e6" title="Standards Status = Trial Use">TU</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px"/> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">How to compare versions
            <br/>  Binding:             <a href="valueset-version-algorithm.html">Version Algorithm</a>  (            <a href="terminologies.html#extensible" title="To be conformant, the concept in this element SHALL be from the specified value

             set if any of the codes within the value set can apply to the concept being communicated.
              If the value set does not cover the concept (based on human review), alternate
             codings (or, data type allowing, text) may be included instead.">Extensible</a> )
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMUlEQVR4Xu3LMQoAIBA
          Dwftr/v8GtdbqEAthAtMspJJUx9rYW8ftHwAA+NcRAAAAXplLq0BWj/rZigAAAABJRU5ErkJggg==)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>              <span title="A sequence of Unicode characters">versionAlgorithmString</span>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px"/> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px"/> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#string">string</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px"/> 
        </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAwEwfT6/ddA0GBAxO3NrLlKUj
          9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Data Type"/>              <span title="A reference to a code defined by a terminology system.">versionAlgorithmCoding</span>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px"/> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px"/> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#Coding">Coding</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px"/> 
        </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAw
          EwfT6/ddA0GBAxO3NrLlKUj9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>  
            <span title="StructureDefinition.name : A natural language name identifying the structure definition.
             This name should be usable as an identifier for the module by machine processing applications
             such as code generation.
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
        

        
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVB
          ORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAL0lEQVR42u3XsQ0AQAgCQHdl/xn8jxvYWB3JlTR0VJLa+OltBwAAYP6E
          EQAAgCsPVYVAgIJrA/sAAAAASUVORK5CYII=)
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
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            dCABMPwMo2ctnoQAAAABJRU5ErkJggg==
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
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            lEQVQ4y2P8//8/AyWAhYFCMAgMuHjx4n+KXaCv+I0szW8WpCG8kFO1lGFKW/SIjAUYgxz/MzAwMDC+nqhDUTQyjuYFBgCNmhP4OvT
            RgwAAAABJRU5ErkJggg== 

             This name should be usable as an identifier for the module by machine processing
             applications such as code generation.">name</span> 
            <a name="StructureDefinition.name"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">1..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#string">string</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Name for this structure definition (computer friendly)
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <span title="StructureDefinition.title : A short, descriptive, user-friendly title for the structure
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          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
        

        
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             definition.">title</span> 
            <a name="StructureDefinition.title"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="languages.html#translatable" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is a candidate for being translated">T</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#string">string</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Name for this structure definition (human friendly)
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>  
            <span title="StructureDefinition.status : The status of this structure definition. Enables tracking
             the life-cycle of the content.
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4pxdraft | active | retired | unknown
            
             (
            )
          
        

        
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           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVB
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            StructureDefinition.experimental : A Boolean value to indicate that this structure definition
             is authored for testing purposes (or education/evaluation/marketing) and is not intended
             to be used for genuine usage.
            
          
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           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
        

        
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             the life-cycle of the content.">status</span> 
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           #F0F0F0 solid; padding:0px 4px 0px 4px">
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           #F0F0F0 solid; padding:0px 4px 0px 4px">1..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#code">code</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">draft | active | retired | unknown
            <br/>  Binding:             <a href="valueset-publication-status.html">PublicationStatus</a>  (            <a href="terminologies.html#required" title="To be conformant, the concept in this element SHALL be from the specified value

             set.">Required</a> )
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.experimental : A Boolean value to indicate that this structure

             definition is authored for testing purposes (or education/evaluation/marketing)
             and is not intended to be used for genuine usage.">experimental</span> 
            <a name="StructureDefinition.experimental"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#boolean">boolean</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">For testing purposes, not real usage
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
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            <span title="StructureDefinition.date : The date  (and optionally time) when the structure definition
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          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
        

        
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVB
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            StructureDefinition.publisher : The name of the organization or individual that published
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          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
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          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
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          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
        

        
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             was last significantly changed. The date must change when the business version
             changes and it must change if the status code changes. In addition, it should change
             when the substantive content of the structure definition changes.">date</span> 
            <a name="StructureDefinition.date"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#dateTime">dateTime</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Date last changed
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
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           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.publisher : The name of the organization or individual responsible

             for the release and ongoing maintenance of the structure definition.">publisher</span> 
            <a name="StructureDefinition.publisher"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
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           solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#string">string</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Name of the publisher/steward (organization or individual)
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAw
          EwfT6/ddA0GBAxO3NrLlKUj9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Data Type"/>  
            <span title="StructureDefinition.contact : Contact details to assist a user in finding and communicating
             with the publisher.
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4pxContact details for the publisher
            
          
        

        
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVB
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            StructureDefinition.description : A free text natural language description of the structure
             definition from a consumer's perspective.
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
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          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
        

        
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVBORw0KGg
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            StructureDefinition.useContext : The content was developed with a focus and intent of
             supporting the contexts that are listed. These contexts may be general categories (gender,
             age, ...) or may be references to specific programs (insurance plans, studies, ...) and
             may be used to assist with indexing and searching for appropriate structure definition
             instances.
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
            padding-left: 3px; padding-right: 3px; border: 1px grey solid; font-weight: bold; color:
             black; background-color: #fff5e6
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4pxThe context that the content is intended to support
            
          
        

        
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVB
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          EQAAgCsPVYVAgIJrA/sAAAAASUVORK5CYII=)
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
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             with the publisher.">contact</span> 
            <a name="StructureDefinition.contact"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">0..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="metadatatypes.html#ContactDetail">ContactDetail</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Contact details for the publisher
            <br/>              <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAwEwfT6/ddA0GBAxO3NrLlKUj
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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.description : A free text natural language description of the

             structure definition from a consumer's perspective.">description</span> 
            <a name="StructureDefinition.description"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="languages.html#translatable" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is a candidate for being translated">T</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#markdown">markdown</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Natural language description of the structure definition
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Data Type"/>              <span title="StructureDefinition.useContext : The content was developed with a focus and intent

             of supporting the contexts that are listed. These contexts may be general categories
             (gender, age, ...) or may be references to specific programs (insurance plans,
             studies, ...) and may be used to assist with indexing and searching for appropriate
             structure definition instances.">useContext</span> 
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            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="versions.html#std-process" style="padding-left: 3px; padding-right: 3px; border: 1px grey solid; font-weight: bold;

             color: black; background-color: #fff5e6" title="Standards Status = Trial Use">TU</a> 
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           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="metadatatypes.html#UsageContext">UsageContext</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">The context that the content is intended to support
            <br/>              <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Data Type"/>  
            <span title="StructureDefinition.jurisdiction : A legal or geographic region in which the structure
             definition is intended to be used.
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
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          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4pxIntended jurisdiction for structure definition (if applicable)
            
             (
            To be conformant, the concept in this element SHALL be from the specified value set if
             any of the codes within the value set can apply to the concept being communicated.  If
             the value set does not cover the concept (based on human review), alternate codings (or,
             data type allowing, text) may be included instead.)
            
          
        

        
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            StructureDefinition.purpose : Explanation of why this structure definition is needed and
             why it has been designed as it has.
            
          
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            StructureDefinition.copyright : A copyright statement relating to the structure definition
             and/or its contents. Copyright statements are generally legal restrictions on the use
             and publishing of the structure definition.
            
          
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            StructureDefinition.keyword : A set of key words or terms from external terminologies
             that may be used to assist with indexing and searching of templates nby describing the
             use of this structure definition, or the content it describes.
            
          
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           padding:0px 4px 0px 4pxAssist with indexing and finding
            
             (
            To be conformant, the concept in this element SHALL be from the specified value set if
             any of the codes within the value set can apply to the concept being communicated.  If
             the value set does not cover the concept (based on human review), alternate codings (or,
             data type allowing, text) may be included instead.)
            
          
        

        
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            StructureDefinition.fhirVersion : The version of the FHIR specification on which this
             StructureDefinition is based - this is the formal version of the specification, without
             the revision number, e.g. [publication].[major].[minor], which is 4.3.0 for this
             version.
            
          
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             (
            )
          
        

        
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           padding:0px 4px 0px 4pxExternal specification that the content is mapped to
            
            
            
          
        

        
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            StructureDefinition.mapping.identity : An Internal id that is used to identify this mapping
             set when specific mappings are made.
            
          
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            StructureDefinition.mapping.uri : An absolute URI that identifies the specification that
             this mapping is expressed to.
            
          
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            +PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC
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            StructureDefinition.mapping.comment : Comments about this mapping, including version notes,
             issues, scope limitations, and other important notes for usage.
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
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           padding:0px 4px 0px 4px
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           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
        

        
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           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVB
          ORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAL0lEQVR42u3XsQ0AQAgCQHdl/xn8jxvYWB3JlTR0VJLa+OltBwAAYP6E
          EQAAgCsPVYVAgIJrA/sAAAAASUVORK5CYII=)
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
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          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
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           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4pxprimitive-type | complex-type | resource | logical
            
             (
            )
          
        

        
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVBORw0KGg
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             definition is intended to be used.">jurisdiction</span> 
            <a name="StructureDefinition.jurisdiction"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="versions.html#std-process" style="padding-left: 3px; padding-right: 3px; border: 1px grey solid; font-weight: bold;

             color: black; background-color: #ffcccc" title="Standards Status = Deprecated">XD</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#CodeableConcept">CodeableConcept</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Intended jurisdiction for structure definition (if applicable)
            <br/>  Binding:             <a href="valueset-jurisdiction.html">Jurisdiction ValueSet</a>  (            <a href="terminologies.html#extensible" title="To be conformant, the concept in this element SHALL be from the specified value

             set if any of the codes within the value set can apply to the concept being communicated.
              If the value set does not cover the concept (based on human review), alternate
             codings (or, data type allowing, text) may be included instead.">Extensible</a> )
            <br/>              <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAw
          EwfT6/ddA0GBAxO3NrLlKUj9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.purpose : Explanation of why this structure definition is needed

             and why it has been designed as it has.">purpose</span> 
            <a name="StructureDefinition.purpose"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="languages.html#translatable" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is a candidate for being translated">T</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#markdown">markdown</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Why this structure definition is defined
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAwEwfT6/ddA0GBAxO3NrLlKUj
          9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.copyright : A copyright statement relating to the structure

             definition and/or its contents. Copyright statements are generally legal restrictions
             on the use and publishing of the structure definition.  The short copyright declaration
             (e.g. (c) '2015+ xyz organization' should be sent in the copyrightLabel element.">copyright</span> 
            <a name="StructureDefinition.copyright"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="languages.html#translatable" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is a candidate for being translated">T</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#markdown">markdown</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Use and/or publishing restrictions
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAw
          EwfT6/ddA0GBAxO3NrLlKUj9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.copyrightLabel : A short string (&lt;50 characters), suitable

             for inclusion in a page footer that identifies the copyright holder, effective
             period, and optionally whether rights are resctricted. (e.g. 'All rights reserved',
             'Some rights reserved').">copyrightLabel</span> 
            <a name="StructureDefinition.copyrightLabel"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="languages.html#translatable" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is a candidate for being translated">T</a>             <a href="versions.html#std-process" style="padding-left: 3px; padding-right: 3px; border: 1px grey solid; font-weight: bold;

             color: black; background-color: #fff5e6" title="Standards Status = Trial Use">TU</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#string">string</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Copyright holder and year(s)
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAwEwfT6/ddA0GBAxO3NrLlKUj
          9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Data Type"/>              <span title="StructureDefinition.keyword : (DEPRECATED) A set of key words or terms from external

             terminologies that may be used to assist with indexing and searching of templates
             nby describing the use of this structure definition, or the content it describes.">keyword</span> 
            <a name="StructureDefinition.keyword"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="versions.html#std-process" style="padding-left: 3px; padding-right: 3px; border: 1px grey solid; font-weight: bold;

             color: black; background-color: #ffcccc" title="Standards Status = Deprecated">XD</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#Coding">Coding</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Assist with indexing and finding
            <br/>  Binding:             <a href="valueset-definition-use.html">Structure Definition Use Codes / Keywords</a>  (            <a href="terminologies.html#extensible" title="To be conformant, the concept in this element SHALL be from the specified value

             set if any of the codes within the value set can apply to the concept being communicated.
              If the value set does not cover the concept (based on human review), alternate
             codings (or, data type allowing, text) may be included instead.">Extensible</a> )
            <br/>              <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAw
          EwfT6/ddA0GBAxO3NrLlKUj9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.fhirVersion : The version of the FHIR specification on which

             this StructureDefinition is based - this is the formal version of the specification,
             without the revision number, e.g. [publication].[major].[minor], which is 4.6.0.
             for this version.">fhirVersion</span> 
            <a name="StructureDefinition.fhirVersion"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#code">code</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">FHIR Version this StructureDefinition targets
            <br/>  Binding:             <a href="valueset-FHIR-version.html">FHIRVersion</a>  (            <a href="terminologies.html#required" title="To be conformant, the concept in this element SHALL be from the specified value

             set.">Required</a> )
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAwEwfT6/ddA0GBAxO3NrLlKUj
          9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Element"/>              <span title="StructureDefinition.mapping : An external specification that the content is mapped

             to.">mapping</span> 
            <a name="StructureDefinition.mapping"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="types.html#BackBoneElement">BackboneElement</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">External specification that the content is mapped to
            <br/>              <span style="font-style: italic" title="sdf-2">+ Rule: Must have at least a name or a uri (or both)</span>             <br/>              <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMUlEQVR4Xu3LMQoAIBA
          Dwftr/v8GtdbqEAthAtMspJJUx9rYW8ftHwAA+NcRAAAAXplLq0BWj/rZigAAAABJRU5ErkJggg==)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.mapping.identity : An Internal id that is used to identify

             this mapping set when specific mappings are made.">identity</span> 
            <a name="StructureDefinition.mapping.identity"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px"/> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">1..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#id">id</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Internal id when this mapping is used
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMUlEQVR4Xu3LMQoAIBADwftr/v8GtdbqEAthAtMspJ
          JUx9rYW8ftHwAA+NcRAAAAXplLq0BWj/rZigAAAABJRU5ErkJggg==)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.mapping.uri : An absolute URI that identifies the specification

             that this mapping is expressed to.">uri</span> 
            <a name="StructureDefinition.mapping.uri"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#uri">uri</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Identifies what this mapping refers to
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMUlEQVR4Xu3LMQoAIBA
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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.mapping.name : A name for the specification that is being mapped

             to.">name</span> 
            <a name="StructureDefinition.mapping.name"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#string">string</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Names what this mapping refers to
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAwEwfT6/ddA0GBAxO3NrLlKUj
          9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.mapping.comment : Comments about this mapping, including version

             notes, issues, scope limitations, and other important notes for usage.">comment</span> 
            <a name="StructureDefinition.mapping.comment"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px"/> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#string">string</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Versions, Issues, Scope limitations etc
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAw
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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.kind : Defines the kind of structure that this definition is

             describing.">kind</span> 
            <a name="StructureDefinition.kind"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">1..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#code">code</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">primitive-type | complex-type | resource | logical
            <br/>  Binding:             <a href="valueset-structure-definition-kind.html">Structure Definition Kind</a>  (            <a href="terminologies.html#required" title="To be conformant, the concept in this element SHALL be from the specified value

             set.">Required</a> )
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAwEwfT6/ddA0GBAxO3NrLlKUj
          9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>  
            <span title="StructureDefinition.abstract : Whether structure this definition describes is abstract
             or not  - that is, whether the structure is not intended to be instantiated. For Resources
             and Data types, abstract types will never be exchanged  between systems.
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
        

        
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           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVB
          ORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAL0lEQVR42u3XsQ0AQAgCQHdl/xn8jxvYWB3JlTR0VJLa+OltBwAAYP6E
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            exg8Shl1ckRUQVaMVkQ2kCstKCEAOw== 
            StructureDefinition.context : Identifies the types of resource or data type elements to
             which the extension can be applied.
            
          
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           solid; padding:0px 4px 0px 4px
            
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4pxIf an extension, where it can be used in instances
            
          
        

        
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           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVBORw0KGg
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            StructureDefinition.context.type : Defines how to interpret the expression that defines
             what the context of the extension is.
            
          
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           padding:0px 4px 0px 4px
            
          
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           padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4pxfhirpath | element | extension
            
             (
            )
          
        

        
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           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVB
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             or not  - that is, whether the structure is not intended to be instantiated. For
             Resources and Data types, abstract types will never be exchanged  between systems.">abstract</span> 
            <a name="StructureDefinition.abstract"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">1..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#boolean">boolean</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Whether the structure is abstract
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAw
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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Element"/>              <span title="StructureDefinition.context : Identifies the types of resource or data type elements

             to which the extension can be applied. For more guidance on using the 'context'
             element, see the [defining extensions page](defining-extensions.html#context).">context</span> 
            <a name="StructureDefinition.context"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">0..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="types.html#BackBoneElement">BackboneElement</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">If an extension, where it can be used in instances
            <br/>              <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAMUlEQVR4Xu3LMQoAIBADwftr/v8GtdbqEAthAtMspJ
          JUx9rYW8ftHwAA+NcRAAAAXplLq0BWj/rZigAAAABJRU5ErkJggg==)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.context.type : Defines how to interpret the expression that

             defines what the context of the extension is.">type</span> 
            <a name="StructureDefinition.context.type"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">1..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#code">code</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">fhirpath | element | extension
            <br/>  Binding:             <a href="valueset-extension-context-type.html">Extension Context Type</a>  (            <a href="terminologies.html#required" title="To be conformant, the concept in this element SHALL be from the specified value

             set.">Required</a> )
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>  
            <span title="StructureDefinition.context.expression : An expression that defines where an extension
             can be used in resources.
            
          
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           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
        

        
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           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVBORw0KGg
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            StructureDefinition.contextInvariant : A set of rules as FHIRPath Invariants about when
             the extension can be used (e.g. co-occurrence variants for the extension). All the rules
             must be true.
            
          
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           padding:0px 4px 0px 4px
            
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4pxFHIRPath invariants - when the extension can be used
            
          
        

        
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           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVB
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            StructureDefinition.type : The type this structure describes. If the derivation kind is
             'specialization' then this is the master definition for a type, and there is always one
             of these (a data type, an extension, a resource, including abstract ones). Otherwise the
             structure definition is a constraint on the stated type (and in this case, the type cannot
             be an abstract type).  References are URLs that are relative to http://hl7.org/fhir/StructureDefinit
            ion e.g. &quot;string&quot; is a reference to http://hl7.org/fhir/StructureDefinition/string.
             Absolute URLs are only allowed in logical models.
            
          
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           solid; padding:0px 4px 0px 4px
            
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4pxType defined or constrained by this structure
            
             (
            To be conformant, the concept in this element SHALL be from the specified value set if
             any of the codes within the value set can apply to the concept being communicated.  If
             the value set does not cover the concept (based on human review), alternate codings (or,
             data type allowing, text) may be included instead.)
          
        

        
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           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVBORw0KGg
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          PVYVAgIJrA/sAAAAASUVORK5CYII=)
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            StructureDefinition.baseDefinition : An absolute URI that is the base structure from which
             this type is derived, either by specialization or constraint.
            
          
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           padding:0px 4px 0px 4px
            
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            (
            )
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
        

        
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           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVB
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          EQAAgCsPVYVAgIJrA/sAAAAASUVORK5CYII=)
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            dCABMPwMo2ctnoQAAAABJRU5ErkJggg==
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            RgwAAAABJRU5ErkJggg== 
            
            
          
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           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4pxspecialization | constraint - How relates to base definition
            
             (
            )
          
        

        
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           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVBORw0KGg
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            exg8Shl1ckRUQVaMVkQ2kCstKCEAOw== 
            StructureDefinition.snapshot : A snapshot view is expressed in a standalone form that
             can be used and interpreted without considering the base StructureDefinition.
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4pxSnapshot view of the structure
            
            
            
            + Rule: All snapshot elements must start with the StructureDefinition's specified type
               for non-logical models, or with the same type name for logical models
            
            + Rule: For CodeableReference elements, target profiles must be listed on the CodeableReference,
               not the CodeableReference.reference
            

             can be used in resources.">expression</span> 
            <a name="StructureDefinition.context.expression"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">1..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#string">string</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Where the extension can be used in instances
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAwEwfT6/ddA0GBAxO3NrLlKUj
          9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.contextInvariant : A set of rules as FHIRPath Invariants about

             when the extension can be used (e.g. co-occurrence variants for the extension).
             All the rules must be true.">contextInvariant</span> 
            <a name="StructureDefinition.contextInvariant"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#string">string</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">FHIRPath invariants - when the extension can be used
            <br/>              <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAw
          EwfT6/ddA0GBAxO3NrLlKUj9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.type : The type this structure describes. If the derivation

             kind is 'specialization' then this is the master definition for a type, and there
             is always one of these (a data type, an extension, a resource, including abstract
             ones). Otherwise the structure definition is a constraint on the stated type (and
             in this case, the type cannot be an abstract type).  References are URLs that are
             relative to http://hl7.org/fhir/StructureDefinition e.g. &quot;string&quot; is
             a reference to http://hl7.org/fhir/StructureDefinition/string. Absolute URLs are
             only allowed in logical models, where they are required.">type</span> 
            <a name="StructureDefinition.type"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">1..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#uri">uri</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Type defined or constrained by this structure
            <br/>  Binding:             <a href="valueset-fhir-types.html">All FHIR Types</a>  (            <a href="terminologies.html#extensible" title="To be conformant, the concept in this element SHALL be from the specified value

             set if any of the codes within the value set can apply to the concept being communicated.
              If the value set does not cover the concept (based on human review), alternate
             codings (or, data type allowing, text) may be included instead.">Extensible</a> )
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAwEwfT6/ddA0GBAxO3NrLlKUj
          9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Reference to another Resource"/>              <span title="StructureDefinition.baseDefinition : An absolute URI that is the base structure

             from which this type is derived, either by specialization or constraint.">baseDefinition</span> 
            <a name="StructureDefinition.baseDefinition"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#canonical">canonical</a> (            <a href="structuredefinition.html">StructureDefinition</a> )          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Definition that this type is constrained/specialized from
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAw
          EwfT6/ddA0GBAxO3NrLlKUj9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>              <span title="StructureDefinition.derivation : How the type relates to the baseDefinition.">derivation</span>             <a name="StructureDefinition.derivation"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null" title="This element is included in summaries">Σ</a>             <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="datatypes.html#code">code</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">specialization | constraint - How relates to base definition
            <br/>  Binding:             <a href="valueset-type-derivation-rule.html">Type Derivation Rule</a>  (            <a href="terminologies.html#required" title="To be conformant, the concept in this element SHALL be from the specified value

             set.">Required</a> )
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAwEwfT6/ddA0GBAxO3NrLlKUj
          9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Element"/>              <span title="StructureDefinition.snapshot : A snapshot view is expressed in a standalone form

             that can be used and interpreted without considering the base StructureDefinition.">snapshot</span> 
            <a name="StructureDefinition.snapshot"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="types.html#BackBoneElement">BackboneElement</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Snapshot view of the structure
            <br/>              <span style="font-style: italic" title="sdf-3">+ Rule: Each element definition in a snapshot must have a formal definition and

               cardinalities, unless model is a logical model</span> 
            <br/>              <span style="font-style: italic" title="sdf-8">+ Rule: All snapshot elements must start with the StructureDefinition's specified

               type for non-logical models, or with the same type name for logical models</span> 
            <br/>              <span style="font-style: italic" title="sdf-24">+ Rule: For CodeableReference elements, target profiles must be listed on the CodeableReferen

              ce, not the CodeableReference.reference</span> 
            <br/>  
            <span style="font-style: italic" title="sdf-25">+ Rule: For CodeableReference elements, bindings must be listed on the CodeableReference,
               not the CodeableReference.concept
            
            
          
        

        
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVB
          ORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAL0lEQVR42u3XsQ0AQAgCQHdl/xn8jxvYWB3JlTR0VJLa+OltBwAAYP6E
          EQAAgCsPVYVAgIJrA/sAAAAASUVORK5CYII=)
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
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            dCABMPwMo2ctnoQAAAABJRU5ErkJggg==
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
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            +PQcFFN5MIyCzqHMKUGVCpMFLK97heq+gggoq+EiwAVjvMhFGmlEUAAAAAElFTkSuQmCC
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            +O8cJABttJM11/x1qZAGqRBEVcNIqdWj1efDqQbb3HwwwwEfABmQUHSPM9dtDAAAAAElFTkSuQmCC
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            d4Hb6dXv3u0f3v1ObEgfPTlerJiP3w1v79+e7OkPrfrfnjuNOtZPrpydaxa+/YrvvdpP779ZxvFPvnwKKBQaFyF/369M2vdaqHRPz
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            3u0vrqyP3owPvepfXQivDQkO/PkKh9K7STVf779P///wD/ACH5BAEKAH8ALAAAAAAQABAAAAemgH+CgxeFF4OIhBdKGwFChYl/hYw
            bdkoBPnaQkosbG3d3VEpSUlonUoY1Gzo6QkI8SrGxWBOFG4uySgY5ZWR3PFy2hnaWZXC/PHcPwkpJk1ShoHcxhQEXSUmtFy6+0iSF
            VResrjoTPDzdcoU+F65CduVU6KAhhQa3F8Tx8nchBoYuqoTLZoAKFRIhqGwqJAULFx0GYpBQeChRIR4TJm6KJMhQRUSBAAA7 
            StructureDefinition.snapshot.element : Captures constraints on each element within the
             resource.
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4pxDefinition of elements in the resource (if no StructureDefinition)
            
            
            
          
        

        
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVBORw0KGg
          oAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAI0lEQVR42u3QIQEAAAACIL/6/4MvTAQOkLYBAAB4kAAAANwMad9AqkRjgNAAAAA
          ASUVORK5CYII=)
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
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            dCABMPwMo2ctnoQAAAABJRU5ErkJggg==
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
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            +O8cJABttJM11/x1qZAGqRBEVcNIqdWj1efDqQbb3HwwwwEfABmQUHSPM9dtDAAAAAElFTkSuQmCC
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            exg8Shl1ckRUQVaMVkQ2kCstKCEAOw== 
            StructureDefinition.differential : A differential view is expressed relative to the base
             StructureDefinition - a statement of differences that it applies.
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid;
           padding:0px 4px 0px 4pxDifferential view of the structure
            
            
            

               not the CodeableReference.concept</span> 
            <br/>              <span style="font-style: italic" title="sdf-26">+ Guideline: The root element of a profile should not have mustSupport = true</span>             <br/>              <span style="font-style: italic" title="sdf-8b">+ Rule: All snapshot elements must have a base definition</span>             <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAALUlEQVR4Xu3IoREAIAw
          EwfT6/ddA0GBAxO3NrLlKUj9263wAAAAvrgEAADClAVWFQIBRHMicAAAAAElFTkSuQmCC)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Data Type"/>              <span title="StructureDefinition.snapshot.element : Captures constraints on each element within

             the resource.">element</span> 
            <a name="StructureDefinition.snapshot.element"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">1..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition.html#ElementDefinition">ElementDefinition</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Definition of elements in the resource (if no StructureDefinition)
            <br/>              <span style="font-style: italic" title="sdf-10">+ Rule: provide either a binding reference or a description (or both)</span>             <br/>              <span style="font-style: italic" title="sdf-28">+ Rule: If there are no discriminators, there must be a definition</span>             <br/>              <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;bas
          e64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAJUlEQVR4Xu3IIQEAAAgDsHd9/w4EQIOamFnaBgAA4M
          MKAACAKwNp30CqZFfFmwAAAABJRU5ErkJggg==)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Element"/>              <span title="StructureDefinition.differential : A differential view is expressed relative to

             the base StructureDefinition - a statement of differences that it applies.">differential</span> 
            <a name="StructureDefinition.differential"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">0..1</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">
            <a href="types.html#BackBoneElement">BackboneElement</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0

           solid; padding:0px 4px 0px 4px">Differential view of the structure
            <br/>              <span style="font-style: italic" title="sdf-20">+ Rule: No slicing on the root element</span>             <br/>  
            <span style="font-style: italic" title="sdf-8a">+ Rule: In any differential, all the elements must start with the StructureDefinition's
               specified type for non-logical models, or with the same type name for logical models
          
        

        
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(data:image/png;base64,iVB
          ORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAI0lEQVR42u3QIQEAAAACIL/6/4MvTAQOkLYBAAB4kAAAANwMad9AqkRj
          gNAAAAAASUVORK5CYII=)
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAWCAYAAAABxvaqAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
            RJTUUH3wYeFzIs1vtcMQAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAE0lEQVQI12P4//8/AxMDAwN
            dCABMPwMo2ctnoQAAAABJRU5ErkJggg==
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
            RJTUUH3wYeFzIZgEiYEgAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAAIElEQVQ4y2P8//8/AyWAiYF
            CMGrAqAGjBowaMGoAAgAALL0DKYQ0DPIAAAAASUVORK5CYII=
            data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAWCAYAAADJqhx8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3
            RJTUUH3wYeFzME+lXFigAAAB1pVFh0Q29tbWVudAAAAAAAQ3JlYXRlZCB3aXRoIEdJTVBkLmUHAAAANklEQVQ4y+3OsRUAIAjEUOL
            +O8cJABttJM11/x1qZAGqRBEVcNIqdWj1efDqQbb3HwwwwEfABmQUHSPM9dtDAAAAAElFTkSuQmCC
            data:image/png;base64,R0lGODlhEAAQAPZ/APrkusOiYvvfqbiXWaV2G+jGhdq1b8GgYf3v1frw3vTUlsWkZNewbcSjY/DQka
            d4Hb6dXv3u0f3v1ObEgfPTlerJiP3w1v79+e7OkPrfrfnjuNOtZPrpydaxa+/YrvvdpP779ZxvFPvnwKKBQaFyF/369M2vdaqHRPz
            58/HNh/vowufFhfroxO3OkPrluv779tK0e6JzGProwvrow9m4eOnIifPTlPDPkP78+Naxaf3v0/zowfXRi+bFhLWUVv379/rnwPvs
            zv3rye3LiPvnv+3MjPDasKiIS/789/3x2f747eXDg+7Mifvu0tu7f+/QkfDTnPXWmPrjsvrjtPbPgrqZW+/QlPz48K2EMv36866OU
            Pvowat8Ivvgq/Pbrvzgq/PguvrgrqN0Gda2evfYm9+7d/rpw9q6e/LSku/Rl/XVl/LSlfrkt+zVqe7Wqv3x1/bNffbOf59wFdS6if
            3u0vrqyP3owPvepfXQivDQkO/PkKh9K7STVf779P///wD/ACH5BAEKAH8ALAAAAAAQABAAAAemgH+CgxeFF4OIhBdKGwFChYl/hYw
            bdkoBPnaQkosbG3d3VEpSUlonUoY1Gzo6QkI8SrGxWBOFG4uySgY5ZWR3PFy2hnaWZXC/PHcPwkpJk1ShoHcxhQEXSUmtFy6+0iSF
            VResrjoTPDzdcoU+F65CduVU6KAhhQa3F8Tx8nchBoYuqoTLZoAKFRIhqGwqJAULFx0GYpBQeChRIR4TJm6KJMhQRUSBAAA7 
            StructureDefinition.differential.element : Captures constraints on each element within
             the resource.
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4px
            
          
          vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0
           solid; padding:0px 4px 0px 4pxDefinition of elements in the resource (if no StructureDefinition)
            
          
        

        
          
            
            
               Documentation for this format
            
          
        
      
    
  
  
    
  
  
    
  
  
    
  
  
    
  
  
    
  
  
    
  
  
  
  
  
  
  
  
  
    
      
      
    
  
  
    
      
      
    
  
  A definition of a FHIR structure. This resource is used to describe the underlying resources,
   data types defined in FHIR, and also for describing extensions and constraints on resources
   and data types.
  
  
    
    
    
  
  
    
    
    
  
  
    
    
    
  
  
    
    
    
  
  
    
    
    
  
  
  
  
  
  
  
    
      
      
      A definition of a FHIR structure. This resource is used to describe the underlying resources,
       data types defined in FHIR, and also for describing extensions and constraints on resources
       and data types.
      
      
      
      
      
        
        
        
      
      
        
        
        
        
        
        
      
      
        
        
        If the resource is contained in another resource, it SHALL be referred to from elsewhere
         in the resource or SHALL refer to the containing resource
        contained.where(((id.exists() and ('#'+id in (%resource.descendants().reference | %resource.descenda
        nts().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))))
         or descendants().where(reference = '#').exists() or descendants().where(as(canonical)
         = '#').exists() or descendants().where(as(uri) = '#').exists()).not()).trace('unmatched',
         id).empty()
        not(exists(for $contained in f:contained return $contained[not(exists(parent::*/descendant::f:refere
        nce/@value=concat('#', $contained/*/f:id/@value)) or exists(descendant::f:reference[@value='#']))]))
        
      
      
        
        
        If a resource is contained in another resource, it SHALL NOT have a meta.versionId or
         a meta.lastUpdated
        
        
        
      
      
        
        
        
        
        
        
      
      
        
          
        
        
          When a resource has no narrative, only systems that fully understand the data can display
           the resource to a human safely. Including a human readable representation in the resource
           makes for a much more robust eco-system and cheaper handling of resources by intermediary
           systems. Some ecosystems restrict distribution of resources to only those systems that
           do fully understand the resources, and as a consequence implementers may believe that
           the narrative is superfluous. However experience shows that such eco-systems often open
           up to new participants over time.
        
        
        
        
        
        
        
      
      
        
        

               specified type for non-logical models, or with the same type name for logical models</span> 
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
           url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAyAAAAACCAYAAACg/LjIAAAAJUlEQVR4Xu3IIQEAAAg
          DsHd9/w4EQIOamFnaBgAA4MMKAACAKwNp30CqZFfFmwAAAABJRU5ErkJggg==)">
            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Data Type"/>              <span title="StructureDefinition.differential.element : Captures constraints on each element

             within the resource.">element</span> 
            <a name="StructureDefinition.differential.element"> </a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="conformance-rules.html#constraints" style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold;

             color: #301212; background-color: #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">1..*</td> 
          <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition.html#ElementDefinition">ElementDefinition</a>           </td>           <td class="hierarchy" style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px

           #F0F0F0 solid; padding:0px 4px 0px 4px">Definition of elements in the resource (if no StructureDefinition)
            <br/>              <br/>            </td>         </tr>         <tr>           <td class="hierarchy" colspan="5">            <br/>              <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format">              <img alt="doco" src="data:(snipped in html view)" style="background-color: inherit"/>  Documentation for this format            </a>           </td>         </tr>       </table>     </div>   </text>   <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-category">    <valueString value="Foundation.Conformance"/>   </extension>   <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-implements">    <valueUri value="http://hl7.org/fhir/StructureDefinition/CanonicalResource"/>   </extension>   <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">    <valueCode value="normative"/>   </extension>   <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-normative-version">    <valueCode value="4.0.0"/>   </extension>   <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">    <valueInteger value="5"/>   </extension>   <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-security-category">    <valueCode value="anonymous"/>   </extension>   <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">    <valueCode value="fhir"/>   </extension>   <url value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>   <version value="5.0.0"/>   <name value="StructureDefinition"/>   <status value="active"/>   <experimental value="false"/>   <date value="2023-03-26T15:21:02+11:00"/>   <publisher value="Health Level Seven International (FHIR Infrastructure)"/>   <contact>     <telecom>       <system value="url"/>       <value value="http://hl7.org/fhir"/>     </telecom>   </contact>   <contact>     <telecom>       <system value="url"/>       <value value="http://www.hl7.org/Special/committees/fiwg/index.cfm"/>     </telecom>   </contact>   <description value="A definition of a FHIR structure. This resource is used to describe the underlying

   resources, data types defined in FHIR, and also for describing extensions and constraints
   on resources and data types."/> 
  <jurisdiction>     <coding>       <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/>       <code value="001"/>       <display value="World"/>     </coding>   </jurisdiction>   <fhirVersion value="5.0.0"/>   <mapping>     <identity value="w5"/>     <uri value="http://hl7.org/fhir/fivews"/>     <name value="FiveWs Pattern Mapping"/>   </mapping>   <mapping>     <identity value="rim"/>     <uri value="http://hl7.org/v3"/>     <name value="RIM Mapping"/>   </mapping>   <mapping>     <identity value="iso11179"/>     <uri value="http://metadata-standards.org/11179/"/>     <name value="ISO 11179"/>   </mapping>   <mapping>     <identity value="objimpl"/>     <uri value="http://hl7.org/fhir/object-implementation"/>     <name value="Object Implementation Information"/>   </mapping>   <kind value="resource"/>   <abstract value="false"/>   <type value="StructureDefinition"/>   <baseDefinition value="http://hl7.org/fhir/StructureDefinition/DomainResource"/>   <derivation value="specialization"/>   <snapshot>     <element id="StructureDefinition">      <path value="StructureDefinition"/>       <short value="Structural Definition"/>       <definition value="A definition of a FHIR structure. This resource is used to describe the underlying

       resources, data types defined in FHIR, and also for describing extensions and constraints
       on resources and data types."/> 
      <alias value="Template"/>       <alias value="Profile"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="StructureDefinition"/>         <min value="0"/>         <max value="*"/>       </base>       <constraint>         <key value="cnl-0"/>         <severity value="warning"/> 
        <human value="Name should be usable as an identifier for the module by machine processing applications
         such as code generation
        
        
        
      
      
        
        
        
        
        (f:derivation/@value = 'constraint') or (count(f:snapshot/f:element) = count(distinct-values(f:snaps
        hot/f:element/f:path/@value)))
        
      
      
        
        
        
        If the first element in a differential has no &quot;.&quot; in the path and it's not a
         logical model, it has no type
        (kind!='logical'  and differential.element.first().path.contains('.').not()) implies differential.el
        ement.first().type.empty()
        f:kind/@value='logical' or not(f:differential/f:element[1][not(contains(f:path/@value,
         '.'))]/f:type)
        
      
      
        
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
        
        Because these 3 fields seem to be have overlapping meaning with the ones in the root of
         StructureDefinition
        

         such as code generation"/> 
        <expression value="name.exists() implies name.matches('^[A-Z]([A-Za-z0-9_]){1,254}$')"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-1"/>         <severity value="error"/>         <human value="Element paths must be unique unless the structure is a constraint"/>         <expression value="derivation = 'constraint' or snapshot.element.select(path).isDistinct()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-4"/>         <requirements value="Ensure that the base types are abstract"/>         <severity value="error"/>         <human value="If the structure is not abstract, then there SHALL be a baseDefinition"/>         <expression value="abstract = true or baseDefinition.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-5"/>         <severity value="error"/>         <human value="If the structure defines an extension then the structure must have context information"/>         <expression value="type != 'Extension' or derivation = 'specialization' or (context.exists())"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-6"/>         <severity value="error"/>         <human value="A structure must have either a differential, or a snapshot (or both)"/>         <expression value="snapshot.exists() or differential.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-11"/>         <requirements value="Ensure that the type is not inconsistent with the other information in the structure"/>         <severity value="error"/>         <human value="If there's a type, its content must match the path name in the first element of

         a snapshot"/> 
        <expression value="kind != 'logical' implies snapshot.empty() or snapshot.element.first().path = type"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-14"/>         <requirements value="elements have id"/>         <severity value="error"/>         <human value="All element definitions must have an id"/>         <expression value="snapshot.element.all(id.exists()) and differential.element.all(id.exists())"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-15"/>         <requirements value="No Type on the root element (snapshot)"/>         <severity value="error"/>         <human value="The first element in a snapshot has no type unless model is a logical model."/>         <expression value="kind!='logical'  implies snapshot.element.first().type.empty()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-15a"/>         <requirements value="No Type on the root element (differential)"/>         <severity value="error"/>         <human value="If the first element in a differential has no &quot;.&quot; in the path and it's

         not a logical model, it has no type"/> 
        <expression value="(kind!='logical'  and differential.element.first().path.contains('.').not()) implies

         differential.element.first().type.empty()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-9"/>         <requirements value="Because these 3 fields seem to be have overlapping meaning with the ones in the

         root of StructureDefinition"/> 
        <severity value="error"/> 
        <human value="In any snapshot or differential, no label, code or requirements on an element without
         a &quot;.&quot; in the path (e.g. the first element)
        children().element.where(path.contains('.').not()).label.empty() and children().element.where(path.c
        ontains('.').not()).code.empty() and children().element.where(path.contains('.').not()).requirements.
        empty()
        not(exists(f:snapshot/f:element[not(contains(f:path/@value, '.')) and (f:label or f:code
         or f:requirements)])) and not(exists(f:differential/f:element[not(contains(f:path/@value,
         '.')) and (f:label or f:code or f:requirements)]))
        
      
      
        
        
        
        
        
        (f:kind/@value = 'logical') or not(exists(f:snapshot)) or (f:type/@value = f:snapshot/f:element[1]/f
        :path/@value)
        
      
      
        
        
        
        
        
        
        
      
      
        
        
        
        
        
        
        
      
      
        
        
        
        
        
        count(f:snapshot/f:element)=count(f:snapshot/f:element/@id) and (count(f:snapshot/f:element)=count(d
        istinct-values(f:snapshot/f:element/@id)))
        
      
      
        
        
        
        
        
        count(f:differential/f:element)=count(f:differential/f:element/@id) and (count(f:differential/f:elem
        ent)=count(distinct-values(f:differential/f:element/@id)))
        
      
      
        
        
        
        
        
        
        
      
      
        
        
        
        
        url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (differential.element.type.code.al
        l(matches('^[a-zA-Z0-9]+$') or matches('^http:\\/\\/hl7\\.org\\/fhirpath\\/System\\.[A-Z][A-Za-z]+$')
        ) and snapshot.element.type.code.all(matches('^[a-zA-Z0-9\\.]+$') or matches('^http:\\/\\/hl7\\.org\\
        /fhirpath\\/System\\.[A-Z][A-Za-z]+$')))
        not(starts-with(f:url/@value, 'http://hl7.org/fhir/StructureDefinition')) or count(f:differential/f:
        element/f:type/f:code[@value and not(matches(string(@value), '^[a-zA-Z0-9\.]+$'))]|f:snapshot/f:eleme
        nt/f:type/f:code[@value and not(matches(string(@value), '^[a-zA-Z0-9]+$\.'))]) =0
        
      
      
        
        
        
        
        
        not(exists(f:differential/f:element/*[starts-with(local-name(), 'defaultValue')])) or
         (f:derivation/@value = 'specialization')
        
      
      
        
        
        
        
        url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (snapshot.element.defaultValue.emp
        ty() and differential.element.defaultValue.empty())
        not(starts-with(f:url/@value, 'http://hl7.org/fhir/StructureDefinition')) or (not(exists(f:snapshot/
        f:element/*[starts-with(local-name(), 'defaultValue')])) and not(exists(f:differential/f:element/*[st
        arts-with(local-name(), 'defaultValue')])))
        
      
      
        
        
        
        
        
        count(*[self::snapshot or self::differential]/f:element[not(contains(f:path/@value, '.'))
         and f:sliceName])=0
        
      
      
      
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      The logical id of the resource, as used in the URL for the resource. Once assigned, this
       value never changes.
      The only time that a resource does not have an id is when it is being submitted to the
       server using a create operation.
      
      
      
        
        
        
      
      
        
          
        
        
      
      
      
      
    
    
      
      

         a &quot;.&quot; in the path (e.g. the first element)"/> 
        <expression value="children().element.where(path.contains('.').not()).label.empty() and children().element.where

        (path.contains('.').not()).code.empty() and children().element.where(path.contains('.').not())
        .requirements.empty()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-16"/>         <requirements value="element ids need to be unique"/>         <severity value="error"/>         <human value="All element definitions must have unique ids (snapshot)"/>         <expression value="snapshot.element.all(id.exists()) and snapshot.element.id.trace('ids').isDistinct()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-17"/>         <requirements value="element ids need to be unique"/>         <severity value="error"/>         <human value="All element definitions must have unique ids (diff)"/>         <expression value="differential.element.all(id.exists()) and differential.element.id.trace('ids').isDistinct()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-18"/>         <requirements value="contextInvariant"/>         <severity value="error"/>         <human value="Context Invariants can only be used for extensions"/>         <expression value="contextInvariant.exists() implies type = 'Extension'"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-19"/>         <requirements value="custom types only in logical models"/>         <severity value="error"/>         <human value="FHIR Specification models only use FHIR defined types"/>         <expression value="url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (differential

         | snapshot).element.type.code.all(matches('^[a-zA-Z0-9]+$') or matches('^http:\\/\\/hl7\\.org
        \\/fhirpath\\/System\\.[A-Z][A-Za-z]+$'))"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-21"/>         <requirements value="no default values on data types or resources"/>         <severity value="error"/>         <human value="Default values can only be specified on specializations"/>         <expression value="differential.element.defaultValue.exists() implies (derivation = 'specialization')"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-22"/>         <requirements value="no default values on data types or resources"/>         <severity value="error"/>         <human value="FHIR Specification models never have default values"/>         <expression value="url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (snapshot.element.defaultVa

        lue.empty() and differential.element.defaultValue.empty())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-23"/>         <requirements value="no sliceName on root"/>         <severity value="error"/>         <human value="No slice name on root"/>         <expression value="(snapshot | differential).element.all(path.contains('.').not() implies sliceName.empty())"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-27"/>         <severity value="error"/>         <human value="If there's a base definition, there must be a derivation "/>         <expression value="baseDefinition.exists() implies derivation.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-29"/>         <severity value="warning"/>         <human value="Elements in Resources must have a min cardinality or 0 or 1 and a max cardinality

         of 1 or *"/> 
        <expression value="((kind in 'resource' | 'complex-type') and (derivation = 'specialization')) implies

         differential.element.where((min != 0 and min != 1) or (max != '1' and max != '*')).empty()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="w5"/>         <map value="conformance.behavior,conformance.content"/>       </mapping>       <mapping>         <identity value="rim"/>         <map value="n/a"/>       </mapping>     </element>     <element id="StructureDefinition.id">      <path value="StructureDefinition.id"/>       <short value="Logical id of this artifact"/>       <definition value="The logical id of the resource, as used in the URL for the resource. Once assigned,

       this value never changes."/> 
      <comment value="Within the context of the FHIR RESTful interactions, the resource has an id except

       for cases like the create and conditional update. Otherwise, the use of the resouce
       id depends on the given use case."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="Resource.id"/>         <min value="0"/>         <max value="1"/>       </base>       <!--  Note: special primitive values have a FHIRPath system type. e.g. this is compiler

       magic (j)  -->
      <type>         <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">          <valueUrl value="id"/>         </extension>         <code value="http://hl7.org/fhirpath/System.String"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.meta">      <path value="StructureDefinition.meta"/>       <short value="Metadata about the resource"/> 
      <definition value="The metadata about the resource. This is content that is maintained by the infrastructure.
       Changes to the content might not always be associated with version changes to the resource.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      A reference to a set of rules that were followed when the resource was constructed, and
       which must be understood when processing the content. Often, this is a reference to an
       implementation guide that defines the special rules along with other profiles etc.
      Asserting this rule set restricts the content to be only understood by a limited set of
       trading partners. This inherently limits the usefulness of the data in the long term.
       However, the existing health eco-system is highly fractured, and not yet ready to define,
       collect, and exchange data in a generally computable sense. Wherever possible, implementers
       and/or specification writers should avoid using this element. Often, when used, the URL
       is a reference to an implementation guide that defines these special rules as part of
       it's narrative along with other profiles, value sets, etc.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      

       Changes to the content might not always be associated with version changes to the
       resource."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="Resource.meta"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="Meta"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.implicitRules">      <path value="StructureDefinition.implicitRules"/>       <short value="A set of rules under which this content was created"/>       <definition value="A reference to a set of rules that were followed when the resource was constructed,

       and which must be understood when processing the content. Often, this is a reference
       to an implementation guide that defines the special rules along with other profiles
       etc."/> 
      <comment value="Asserting this rule set restricts the content to be only understood by a limited

       set of trading partners. This inherently limits the usefulness of the data in the
       long term. However, the existing health eco-system is highly fractured, and not
       yet ready to define, collect, and exchange data in a generally computable sense.
       Wherever possible, implementers and/or specification writers should avoid using
       this element. Often, when used, the URL is a reference to an implementation guide
       that defines these special rules as part of its narrative along with other profiles,
       value sets, etc."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="Resource.implicitRules"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="uri"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="true"/> 
      <isModifierReason value="This element is labeled as a modifier because the implicit rules may provide additional
       knowledge about the resource that modifies it's meaning or interpretation
      
    
    
      
      
      
      Language is provided to support indexing and accessibility (typically, services such as
       text to speech use the language tag). The html language tag in the narrative applies 
       to the narrative. The language tag on the resource may be used to specify the language
       of other presentations generated from the data in the resource. Not all the content has
       to be in the base language. The Resource.language should not be assumed to apply to the
       narrative automatically. If a language is specified, it should it also be specified on
       the div element in the html (see rules in HTML5 for information about the relationship
       between xml:lang and the html lang attribute).
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
          
        
        
          
        
        
          
        
        
        
        
      
    
    
      
      
      A human-readable narrative that contains a summary of the resource and can be used to
       represent the content of the resource to a human. The narrative need not encode all the
       structured data, but is required to contain sufficient detail to make it &quot;clinically
       safe&quot; for a human to just read the narrative. Resource definitions may define what
       content should be represented in the narrative to ensure clinical safety.
      Contained resources do not have narrative. Resources that are not contained SHOULD have
       a narrative. In some cases, a resource may only have text with little or no additional
       discrete data (as long as all minOccurs=1 elements are satisfied).  This may be necessary
       for data from legacy systems where information is captured as a &quot;text blob&quot;
       or where text is additionally entered raw or narrated and encoded information is added
       later.
      
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
    
    
      
      
      These resources do not have an independent existence apart from the resource that contains
       them - they cannot be identified independently, and nor can they have their own independent
       transaction scope.
      This should never be done when the content can be identified properly, as once identification
       is lost, it is extremely difficult (and context dependent) to restore it again. Contained
       resources may have profiles and tags In their meta elements, but SHALL NOT have security
       labels.
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        Containing new R4B resources within R4 resources may cause interoperability issues if
         instances are shared with R4 systems
        ($this is Citation or $this is Evidence or $this is EvidenceReport or $this is EvidenceVariable
         or $this is MedicinalProductDefinition or $this is PackagedProductDefinition or $this
         is AdministrableProductDefinition or $this is Ingredient or $this is ClinicalUseDefinition
         or $this is RegulatedAuthorization or $this is SubstanceDefinition or $this is SubscriptionStatus
         or $this is SubscriptionTopic) implies (%resource is Citation or %resource is Evidence
         or %resource is EvidenceReport or %resource is EvidenceVariable or %resource is MedicinalProductDefi
        nition or %resource is PackagedProductDefinition or %resource is AdministrableProductDefinition
         or %resource is Ingredient or %resource is ClinicalUseDefinition or %resource is RegulatedAuthorizat
        ion or %resource is SubstanceDefinition or %resource is SubscriptionStatus or %resource
         is SubscriptionTopic)
        not(f:Citation|f:Evidence|f:EvidenceReport|f:EvidenceVariable|f:MedicinalProductDefinition|f:Package
        dProductDefinition|f:AdministrableProductDefinition|f:Ingredient|f:ClinicalUseDefinition|f:RegulatedA
        uthorization|f:SubstanceDefinition|f:SubscriptionStatus|f:SubscriptionTopic) or not(parent::f:Citatio
        n|parent::f:Evidence|parent::f:EvidenceReport|parent::f:EvidenceVariable|parent::f:MedicinalProductDe
        finition|parent::f:PackagedProductDefinition|parent::f:AdministrableProductDefinition|parent::f:Ingre
        dient|parent::f:ClinicalUseDefinition|parent::f:RegulatedAuthorization|parent::f:SubstanceDefinition|
        f:SubscriptionStatus|f:SubscriptionTopic)
        
      
      
      
      
      
        
        
      
    
    
      
      

       knowledge about the resource that modifies its meaning or interpretation"/> 
      <isSummary value="true"/>     </element>     <element id="StructureDefinition.language">      <path value="StructureDefinition.language"/>       <short value="Language of the resource content"/>       <definition value="The base language in which the resource is written."/>       <comment value="Language is provided to support indexing and accessibility (typically, services

       such as text to speech use the language tag). The html language tag in the narrative
       applies  to the narrative. The language tag on the resource may be used to specify
       the language of other presentations generated from the data in the resource. Not
       all the content has to be in the base language. The Resource.language should not
       be assumed to apply to the narrative automatically. If a language is specified,
       it should it also be specified on the div element in the html (see rules in HTML5
       for information about the relationship between xml:lang and the html lang attribute)."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="Resource.language"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="code"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="Language"/>         </extension>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-isCommonBinding">          <valueBoolean value="true"/>         </extension>         <strength value="required"/>         <description value="IETF language tag for a human language"/>         <valueSet value="http://hl7.org/fhir/ValueSet/all-languages|5.0.0"/>         <additional>           <purpose value="starter"/>           <valueSet value="http://hl7.org/fhir/ValueSet/languages"/>         </additional>       </binding>     </element>     <element id="StructureDefinition.text">      <path value="StructureDefinition.text"/>       <short value="Text summary of the resource, for human interpretation"/>       <definition value="A human-readable narrative that contains a summary of the resource and can be used

       to represent the content of the resource to a human. The narrative need not encode
       all the structured data, but is required to contain sufficient detail to make it
       &quot;clinically safe&quot; for a human to just read the narrative. Resource definitions
       may define what content should be represented in the narrative to ensure clinical
       safety."/> 
      <comment value="Contained resources do not have a narrative. Resources that are not contained SHOULD

       have a narrative. In some cases, a resource may only have text with little or no
       additional discrete data (as long as all minOccurs=1 elements are satisfied). 
       This may be necessary for data from legacy systems where information is captured
       as a &quot;text blob&quot; or where text is additionally entered raw or narrated
       and encoded information is added later."/> 
      <alias value="narrative"/>       <alias value="html"/>       <alias value="xhtml"/>       <alias value="display"/>       <min value="0"/>       <max value="1"/>       <base>         <path value="DomainResource.text"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="Narrative"/>       </type>       <condition value="dom-6"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="Act.text?"/>       </mapping>     </element>     <element id="StructureDefinition.contained">      <path value="StructureDefinition.contained"/>       <short value="Contained, inline Resources"/>       <definition value="These resources do not have an independent existence apart from the resource that

       contains them - they cannot be identified independently, nor can they have their
       own independent transaction scope. This is allowed to be a Parameters resource
       if and only if it is referenced by a resource that provides context/meaning."/> 
      <comment value="This should never be done when the content can be identified properly, as once

       identification is lost, it is extremely difficult (and context dependent) to restore
       it again. Contained resources may have profiles and tags in their meta elements,
       but SHALL NOT have security labels."/> 
      <alias value="inline resources"/>       <alias value="anonymous resources"/>       <alias value="contained resources"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="DomainResource.contained"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Resource"/>       </type>       <condition value="dom-2"/>       <condition value="dom-4"/>       <condition value="dom-3"/>       <condition value="dom-5"/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="N/A"/>       </mapping>     </element>     <element id="StructureDefinition.extension">      <path value="StructureDefinition.extension"/>       <short value="Additional content defined by implementations"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the resource. To make the use of extensions safe and manageable, there is a strict
       set of governance  applied to the definition and use of extensions. Though any implementer
       can define an extension, there is a set of requirements that SHALL be met as part of the
       definition of the extension.
      There can be no stigma associated with the use of extensions by any application, project,
       or standard - regardless of the institution or jurisdiction that uses or defines the extensions.
        The use of extensions is what allows the FHIR specification to retain a core level of
       simplicity for everyone.
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
    
    
      
      

       of the resource. To make the use of extensions safe and managable, there is a strict
       set of governance applied to the definition and use of extensions. Though any implementer
       can define an extension, there is a set of requirements that SHALL be met as part
       of the definition of the extension."/> 
      <comment value="There can be no stigma associated with the use of extensions by any application,

       project, or standard - regardless of the institution or jurisdiction that uses
       or defines the extensions.  The use of extensions is what allows the FHIR specification
       to retain a core level of simplicity for everyone."/> 
      <alias value="extensions"/>       <alias value="user content"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="DomainResource.extension"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Extension"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="ext-1"/>         <severity value="error"/>         <human value="Must have either extensions or value[x], not both"/>         <expression value="extension.exists() != value.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="N/A"/>       </mapping>     </element>     <element id="StructureDefinition.modifierExtension">      <path value="StructureDefinition.modifierExtension"/>       <short value="Extensions that cannot be ignored"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the resource and that modifies the understanding of the element that contains it and/or
       the understanding of the containing element's descendants. Usually modifier elements provide
       negation or qualification. To make the use of extensions safe and manageable, there is
       a strict set of governance applied to the definition and use of extensions. Though any
       implementer is allowed to define an extension, there is a set of requirements that SHALL
       be met as part of the definition of the extension. Applications processing a resource
       are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource
       (including cannot change the meaning of modifierExtension itself).
      There can be no stigma associated with the use of extensions by any application, project,
       or standard - regardless of the institution or jurisdiction that uses or defines the extensions.
        The use of extensions is what allows the FHIR specification to retain a core level of
       simplicity for everyone.
      Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly
       distinguished from the vast majority of extensions which can be safely ignored.  This
       promotes interoperability by eliminating the need for implementers to prohibit the presence
       of extensions. For further information, see the [definition of modifier extensions](extensibility.ht
      ml#modifierExtension).
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      
      Modifier extensions are expected to modify the meaning or interpretation of the resource
       that contains them
      
      
        
        
      
    
    
      
      

       of the resource and that modifies the understanding of the element that contains
       it and/or the understanding of the containing element's descendants. Usually modifier
       elements provide negation or qualification. To make the use of extensions safe
       and managable, there is a strict set of governance applied to the definition and
       use of extensions. Though any implementer is allowed to define an extension, there
       is a set of requirements that SHALL be met as part of the definition of the extension.
       Applications processing a resource are required to check for modifier extensions.
Modifier extensions SHALL NOT change the meaning of any elements on Resource or
       DomainResource (including cannot change the meaning of modifierExtension itself)."/> 
      <comment value="There can be no stigma associated with the use of extensions by any application,

       project, or standard - regardless of the institution or jurisdiction that uses
       or defines the extensions.  The use of extensions is what allows the FHIR specification
       to retain a core level of simplicity for everyone."/> 
      <requirements value="Modifier extensions allow for extensions that *cannot* be safely ignored to be

       clearly distinguished from the vast majority of extensions which can be safely
       ignored.  This promotes interoperability by eliminating the need for implementers
       to prohibit the presence of extensions. For further information, see the [definition
       of modifier extensions](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/>       <alias value="user content"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="DomainResource.modifierExtension"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Extension"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="ext-1"/>         <severity value="error"/>         <human value="Must have either extensions or value[x], not both"/>         <expression value="extension.exists() != value.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="true"/>       <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the

       resource that contains them"/> 
      <isSummary value="true"/>       <mapping>         <identity value="rim"/>         <map value="N/A"/>       </mapping>     </element>     <element id="StructureDefinition.url">      <path value="StructureDefinition.url"/>       <short value="Canonical identifier for this structure definition, represented as a URI (globally

       unique)"/> 

      <definition value="An absolute URI that is used to identify this structure definition when it is referenced
       in a specification, model, design or an instance; also called its canonical identifier.
       This SHOULD be globally unique and SHOULD be a literal address at which at which an authoritative
       instance of this structure definition is (or will be) published. This URL can be the target
       of a canonical reference. It SHALL remain the same when the structure definition is stored
       on different servers.
      Can be a urn:uuid: or a urn:oid: but real http: addresses are preferred.  Multiple instances
       may share the same URL if they have a distinct version.

The determination of when to create a new version of a resource (same url, new version)
       vs. defining a new artifact is up to the author.  Considerations for making this decision
       are found in [Technical and Business Versions](resource.html#versions). 

In some cases, the resource can no longer be found at the stated url, but the url itself
       cannot change. Implementations can use the [meta.source](resource.html#meta) element to
       indicate where the current master source of the resource can be found.
      
      
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
      
        
        
      
    
    
      
      
      A formal identifier that is used to identify this structure definition when it is represented
       in other formats, or referenced in a specification, model, design or an instance.

       This SHOULD be globally unique and SHOULD be a literal address at which an authoritative
       instance of this structure definition is (or will be) published. This URL can be
       the target of a canonical reference. It SHALL remain the same when the structure
       definition is stored on different servers."/> 
      <comment value="Can be a urn:uuid: or a urn:oid: but real http: addresses are preferred.  Multiple

       instances may share the same URL if they have a distinct version.
The determination of when to create a new version of a resource (same url, new
       version) vs. defining a new artifact is up to the author.  Considerations for making
       this decision are found in [Technical and Business Versions](resource.html#versions).
       
In some cases, the resource can no longer be found at the stated url, but the url
       itself cannot change. Implementations can use the [meta.source](resource.html#meta)
       element to indicate where the current master source of the resource can be found."/> 
      <requirements value="Allows the structure definition to be referenced by a single globally unique identifier."/>       <alias value="url"/>       <alias value="authoritative-url"/>       <alias value="destination"/>       <alias value="identity"/>       <min value="1"/>       <max value="1"/>       <base>         <path value="StructureDefinition.url"/>         <min value="1"/>         <max value="1"/>       </base>       <type>         <code value="uri"/>       </type>       <condition value="sdf-19"/>       <condition value="sdf-22"/>       <constraint>         <key value="cnl-1"/>         <severity value="warning"/>         <human value="URL should not contain | or # - these characters make processing canonical references

         problematic"/> 
        <expression value="exists() implies matches('^[^|# ]+$')"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.identifier"/>       </mapping>     </element>     <element id="StructureDefinition.identifier">      <path value="StructureDefinition.identifier"/>       <short value="Additional identifier for the structure definition"/>       <definition value="A formal identifier that is used to identify this structure definition when it

       is represented in other formats, or referenced in a specification, model, design
       or an instance."/> 

      <comment value="Typically, this is used for identifiers that can go in an HL7 V3 II (instance identifier)
       data type, and can then identify this structure definition outside of FHIR, where it is
       not possible to use the logical URI.

       data type, and can then identify this structure definition outside of FHIR, where
       it is not possible to use the logical URI."/> 

      <requirements value="Allows externally provided and/or usable business identifiers to be easily associated
       with the module.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      The identifier that is used to identify this version of the structure definition when
       it is referenced in a specification, model, design or instance. This is an arbitrary value
       managed by the structure definition author and is not expected to be globally unique.
       For example, it might be a timestamp (e.g. yyyymmdd) if a managed version is not available.
       There is also no expectation that versions can be placed in a lexicographical sequence.
      There may be different structure definition instances that have the same identifier but
       different versions.  The version can be appended to the url in a reference to allow a
       reference to a particular business version of the structure definition with the format
       [url]|[version].
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      A natural language name identifying the structure definition. This name should be usable
       as an identifier for the module by machine processing applications such as code generation.

       with the module."/> 
      <min value="0"/>       <max value="*"/>       <base>         <path value="StructureDefinition.identifier"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Identifier"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.identifier"/>       </mapping>       <mapping>         <identity value="iso11179"/>         <map value="Identifier part"/>       </mapping>       <mapping>         <identity value="objimpl"/>         <map value="no-gen-base"/>       </mapping>     </element>     <element id="StructureDefinition.version">      <path value="StructureDefinition.version"/>       <short value="Business version of the structure definition"/>       <definition value="The identifier that is used to identify this version of the structure definition

       when it is referenced in a specification, model, design or instance. This is an
       arbitrary value managed by the structure definition author and is not expected
       to be globally unique. There is no expectation that versions can be placed in a
       lexicographical sequence, so authors are encouraged to populate the StructureDefinition.versi
      onAlgorithm[x] element to enable comparisons. If there is no managed version available,
       authors can consider using ISO date/time syntax (e.g., '2023-01-01')."/> 
      <comment value="There may be different structure definition instances that have the same identifier

       but different versions.  The version can be appended to the url in a reference
       to allow a reference to a particular business version of the structure definition
       with the format [url]|[version]. The version SHOULD NOT contain a '#' - see [Business
       Version](resource.html#bv-format)."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.version"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="string"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.version"/>       </mapping>       <mapping>         <identity value="iso11179"/>         <map value="Version"/>       </mapping>     </element>     <element id="StructureDefinition.versionAlgorithm[x]">      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">        <valueCode value="trial-use"/>       </extension>       <path value="StructureDefinition.versionAlgorithm[x]"/>       <short value="How to compare versions"/>       <definition value="Indicates the mechanism used to compare versions to determine which is more current."/>       <comment value="If set as a string, this is a FHIRPath expression that has two additional context

       variables passed in - %version1 and %version2 and will return a negative number
       if version1 is newer, a positive number if version2 and a 0 if the version ordering
       can't be successfully be determined."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.versionAlgorithm[x]"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="string"/>       </type>       <type>         <code value="Coding"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <strength value="extensible"/>         <valueSet value="http://hl7.org/fhir/ValueSet/version-algorithm"/>       </binding>     </element>     <element id="StructureDefinition.name">      <path value="StructureDefinition.name"/>       <short value="Name for this structure definition (computer friendly)"/>       <definition value="A natural language name identifying the structure definition. This name should

       be usable as an identifier for the module by machine processing applications such
       as code generation."/> 

      <comment value="The name is not expected to be globally unique. The name should be a simple alphanumeric
       type name to ensure that it is machine-processing friendly.Some Examples: 

* O2SatObservation
* PresentationReport
* Immunization2
* AcmeAdmissionRecordOld.
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      

       type name to ensure that it is machine-processing friendly.Some Examples: 
* O2SatObservation
* PresentationReport
* Immunization2
* AcmeAdmissionRecordOld."/> 
      <requirements value="Support human navigation and code generation."/>       <min value="1"/>       <max value="1"/>       <base>         <path value="StructureDefinition.name"/>         <min value="1"/>         <max value="1"/>       </base>       <type>         <code value="string"/>       </type>       <condition value="cnl-0"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.title">      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <path value="StructureDefinition.title"/>       <short value="Name for this structure definition (human friendly)"/>       <definition value="A short, descriptive, user-friendly title for the structure definition."/> 
      <comment value="This name does not need to be machine-processing friendly and may contain punctuation,
       white-space, etc.Applications don't have to use this name but can always fall back to
       it. The title also corresponds to the label for the root element.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
    
    
      
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      This is labeled as &quot;Is Modifier&quot; because applications should not use a retired
       {{title}} without due consideration
      
      
        
          
        
        
          
        
        
        
        
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      A Boolean value to indicate that this structure definition is authored for testing purposes
       (or education/evaluation/marketing) and is not intended to be used for genuine usage.
      
      Enables experimental content to be developed following the same lifecycle that would be
       used for a production-level structure definition.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      The date  (and optionally time) when the structure definition was published. The date
       must change when the business version changes and it must change if the status code changes.
       In addition, it should change when the substantive content of the structure definition
       changes.
      Note that this is not the same as the resource last-modified-date, since the resource
       may be a secondary representation of the structure definition. Additional specific dates
       may be added as extensions or be found by consulting Provenances associated with past
       versions of the resource.
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
      
        
        
      
    
    
      
      
      
      Usually an organization but may be an individual. The publisher (or steward) of the structure
       definition is the organization or individual primarily responsible for the maintenance
       and upkeep of the structure definition. This is not necessarily the same individual or
       organization that developed and initially authored the content. The publisher is the primary
       point of contact for questions or issues with the structure definition. This item SHOULD
       be populated unless the information is available from context.
      Helps establish the &quot;authority/credibility&quot; of the structure definition.  May
       also allow for contact.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
    
    
      
      

       white-space, etc.Applications don't have to use this name but can always fall back
       to it. The title also corresponds to the label for the root element."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.title"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="string"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.status">      <path value="StructureDefinition.status"/>       <short value="draft | active | retired | unknown"/>       <definition value="The status of this structure definition. Enables tracking the life-cycle of the

       content."/> 
      <comment value="Allows filtering of structure definitions that are appropriate for use versus not.
See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <min value="1"/>       <max value="1"/>       <base>         <path value="StructureDefinition.status"/>         <min value="1"/>         <max value="1"/>       </base>       <type>         <code value="code"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="true"/>       <isModifierReason value="This is labeled as &quot;Is Modifier&quot; because applications should not use

       a retired {{title}} without due consideration"/> 
      <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="PublicationStatus"/>         </extension>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-isCommonBinding">          <valueBoolean value="true"/>         </extension>         <strength value="required"/>         <description value="The lifecycle status of an artifact."/>         <valueSet value="http://hl7.org/fhir/ValueSet/publication-status|5.0.0"/>       </binding>       <mapping>         <identity value="w5"/>         <map value="FiveWs.status"/>       </mapping>       <mapping>         <identity value="iso11179"/>         <map value="Registration status"/>       </mapping>     </element>     <element id="StructureDefinition.experimental">      <path value="StructureDefinition.experimental"/>       <short value="For testing purposes, not real usage"/>       <definition value="A Boolean value to indicate that this structure definition is authored for testing

       purposes (or education/evaluation/marketing) and is not intended to be used for
       genuine usage."/> 
      <comment value="Allows filtering of structure definitions that are appropriate for use versus not."/>       <requirements value="Enables experimental content to be developed following the same lifecycle that

       would be used for a production-level structure definition."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.experimental"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="boolean"/>       </type>       <meaningWhenMissing value="If absent, this resource is treated as though it is not experimental."/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.class"/>       </mapping>       <mapping>         <identity value="iso11179"/>         <map value="Registration status"/>       </mapping>     </element>     <element id="StructureDefinition.date">      <path value="StructureDefinition.date"/>       <short value="Date last changed"/>       <definition value="The date  (and optionally time) when the structure definition was last significantly

       changed. The date must change when the business version changes and it must change
       if the status code changes. In addition, it should change when the substantive
       content of the structure definition changes."/> 
      <comment value="The date is often not tracked until the resource is published, but may be present

       on draft content. Note that this is not the same as the resource last-modified-date,
       since the resource may be a secondary representation of the structure definition.
       Additional specific dates may be added as extensions or be found by consulting
       Provenances associated with past versions of the resource.
See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <alias value="Revision Date"/>       <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.date"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="dateTime"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.recorded"/>       </mapping>     </element>     <element id="StructureDefinition.publisher">      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <path value="StructureDefinition.publisher"/>       <short value="Name of the publisher/steward (organization or individual)"/>       <definition value="The name of the organization or individual responsible for the release and ongoing

       maintenance of the structure definition."/> 
      <comment value="Usually an organization but may be an individual. The publisher (or steward) of

       the structure definition is the organization or individual primarily responsible
       for the maintenance and upkeep of the structure definition. This is not necessarily
       the same individual or organization that developed and initially authored the content.
       The publisher is the primary point of contact for questions or issues with the
       structure definition. This item SHOULD be populated unless the information is available
       from context."/> 
      <requirements value="Helps establish the &quot;authority/credibility&quot; of the structure definition.

        May also allow for contact."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.publisher"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="string"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.witness"/>       </mapping>       <mapping>         <identity value="iso11179"/>         <map value="Registration Authority"/>       </mapping>     </element>     <element id="StructureDefinition.contact">      <path value="StructureDefinition.contact"/>       <short value="Contact details for the publisher"/>       <definition value="Contact details to assist a user in finding and communicating with the publisher."/>       <comment value="May be a web site, an email address, a telephone number, etc.
See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <min value="0"/>       <max value="*"/>       <base>         <path value="StructureDefinition.contact"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="ContactDetail"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.description">      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <path value="StructureDefinition.description"/>       <short value="Natural language description of the structure definition"/> 
      <definition value="A free text natural language description of the structure definition from a consumer's
       perspective.
      This description can be used to capture details such as why the structure definition was
       built, comments about misuse, instructions for clinical use and interpretation, literature
       references, examples from the paper world, etc. It is not a rendering of the structure
       definition as conveyed in the 'text' field of the resource itself. This item SHOULD be
       populated unless the information is available from context (e.g. the language of the structure
       definition is presumed to be the predominant language in the place the structure definition
       was created).
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
    
    
      
        
      
      
      
      The content was developed with a focus and intent of supporting the contexts that are
       listed. These contexts may be general categories (gender, age, ...) or may be references
       to specific programs (insurance plans, studies, ...) and may be used to assist with indexing
       and searching for appropriate structure definition instances.
      When multiple useContexts are specified, there is no expectation that all or any of the
       contexts apply.
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
    
    
      
      
      
      It may be possible for the structure definition to be used in jurisdictions other than
       those for which it was originally designed or intended.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
          
        
        
          
        
        
        
        
      
      
        
        
      
    
    
      
      
      Explanation of why this structure definition is needed and why it has been designed as
       it has.
      This element does not describe the usage of the structure definition. Instead, it provides
       traceability of ''why'' the resource is either needed or ''why'' it is defined as it is.
        This may be used to point to source materials or specifications that drove the structure
       of this structure definition.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      A copyright statement relating to the structure definition and/or its contents. Copyright
       statements are generally legal restrictions on the use and publishing of the structure
       definition.

       perspective."/> 
      <comment value="This description can be used to capture details such as comments about misuse,

       instructions for clinical use and interpretation, literature references, examples
       from the paper world, etc. It is not a rendering of the structure definition as
       conveyed in the 'text' field of the resource itself. This item SHOULD be populated
       unless the information is available from context (e.g. the language of the structure
       definition is presumed to be the predominant language in the place the structure
       definition was created)."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.description"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="markdown"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.useContext">      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">        <valueCode value="trial-use"/>       </extension>       <path value="StructureDefinition.useContext"/>       <short value="The context that the content is intended to support"/>       <definition value="The content was developed with a focus and intent of supporting the contexts that

       are listed. These contexts may be general categories (gender, age, ...) or may
       be references to specific programs (insurance plans, studies, ...) and may be used
       to assist with indexing and searching for appropriate structure definition instances."/> 
      <comment value="When multiple useContexts are specified, there is no expectation that all or any

       of the contexts apply."/> 
      <requirements value="Assist in searching for appropriate content."/>       <min value="0"/>       <max value="*"/>       <base>         <path value="StructureDefinition.useContext"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="UsageContext"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.jurisdiction">      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">        <valueCode value="deprecated"/>       </extension>       <path value="StructureDefinition.jurisdiction"/>       <short value="Intended jurisdiction for structure definition (if applicable)"/>       <definition value="A legal or geographic region in which the structure definition is intended to be

       used."/> 
      <comment value="It may be possible for the structure definition to be used in jurisdictions other

       than those for which it was originally designed or intended.
DEPRECATION NOTE: For consistency, implementations are encouraged to migrate to
       using the new 'jurisdiction' code in the useContext element.  (I.e. useContext.code
       indicating http://terminology.hl7.org/CodeSystem/usage-context-type#jurisdiction
       and useContext.valueCodeableConcept indicating the jurisdiction.)"/> 
      <min value="0"/>       <max value="*"/>       <base>         <path value="StructureDefinition.jurisdiction"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="CodeableConcept"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="Jurisdiction"/>         </extension>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-isCommonBinding">          <valueBoolean value="true"/>         </extension>         <strength value="extensible"/>         <description value="Countries and regions within which this artifact is targeted for use."/>         <valueSet value="http://hl7.org/fhir/ValueSet/jurisdiction"/>       </binding>     </element>     <element id="StructureDefinition.purpose">      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <path value="StructureDefinition.purpose"/>       <short value="Why this structure definition is defined"/>       <definition value="Explanation of why this structure definition is needed and why it has been designed

       as it has."/> 
      <comment value="This element does not describe the usage of the structure definition. Instead,

       it provides traceability of ''why'' the resource is either needed or ''why'' it
       is defined as it is.  This may be used to point to source materials or specifications
       that drove the structure of this structure definition."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.purpose"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="markdown"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.why[x]"/>       </mapping>       <mapping>         <identity value="objimpl"/>         <map value="no-gen-base"/>       </mapping>     </element>     <element id="StructureDefinition.copyright">      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <path value="StructureDefinition.copyright"/>       <short value="Use and/or publishing restrictions"/>       <definition value="A copyright statement relating to the structure definition and/or its contents.

       Copyright statements are generally legal restrictions on the use and publishing
       of the structure definition.  The short copyright declaration (e.g. (c) '2015+
       xyz organization' should be sent in the copyrightLabel element."/> 
      <comment value="..."/> 
      <requirements value="Consumers must be able to determine any legal restrictions on the use of the structure
       definition and/or its content.
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
      
        
        
      
    
    
      
      
      A set of key words or terms from external terminologies that may be used to assist with
       indexing and searching of templates nby describing the use of this structure definition,
       or the content it describes.
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
          
        
        
        
        
      
      
        
        
      
    
    
      
      
      The version of the FHIR specification on which this StructureDefinition is based - this
       is the formal version of the specification, without the revision number, e.g. [publication].[major].
      [minor], which is 4.3.0 for this version.
      A StructureDefinition does not need to specify the target it applies to as StructureDefinitions
       will often be valid across multiple versions of FHIR. FHIR tooling can determine whether
       a StructureDefinition is consistent with a particular StructureDefinition if desired.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
          
        
        
          
        
        
        
        
      
    
    
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      
      Unique id for the element within a resource (for internal references). This may be any
       string value that does not contain spaces.
      
      
      
        
        
        
      
      
        
          
        
        
      
      
      
      
        
        
      
    
    
      
      

       definition and/or its content."/> 
      <alias value="License"/>       <alias value="Restrictions"/>       <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.copyright"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="markdown"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="objimpl"/>         <map value="no-gen-base"/>       </mapping>     </element>     <element id="StructureDefinition.copyrightLabel">      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">        <valueCode value="trial-use"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <path value="StructureDefinition.copyrightLabel"/>       <short value="Copyright holder and year(s)"/>       <definition value="A short string (&lt;50 characters), suitable for inclusion in a page footer that

       identifies the copyright holder, effective period, and optionally whether rights
       are resctricted. (e.g. 'All rights reserved', 'Some rights reserved')."/> 
      <comment value="The (c) symbol should NOT be included in this string. It will be added by software

       when rendering the notation. Full details about licensing, restrictions, warrantees,
       etc. goes in the more general 'copyright' element."/> 
      <requirements value="Defines the content expected to be rendered in all representations of the artifact."/>       <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.copyrightLabel"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="string"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.keyword">      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">        <valueCode value="deprecated"/>       </extension>       <path value="StructureDefinition.keyword"/>       <short value="Assist with indexing and finding"/>       <definition value="(DEPRECATED) A set of key words or terms from external terminologies that may be

       used to assist with indexing and searching of templates nby describing the use
       of this structure definition, or the content it describes."/> 
      <comment value="Note that this element is deprecated. Use the [http://hl7.org/fhir/StructureDefinition/artifa

      ct-topic](http://hl7.org/fhir/extensions/StructureDefinition-artifact-topic.html)
       extension instead."/> 
      <requirements value="Assist in searching for appropriate StructureDefinitions."/>       <min value="0"/>       <max value="*"/>       <base>         <path value="StructureDefinition.keyword"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Coding"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="StructureDefinitionKeyword"/>         </extension>         <strength value="extensible"/>         <description value="Codes for the meaning of the defined structure (SNOMED CT and LOINC codes, as an

         example)."/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/definition-use"/>       </binding>       <mapping>         <identity value="iso11179"/>         <map value="keywords"/>       </mapping>     </element>     <element id="StructureDefinition.fhirVersion">      <path value="StructureDefinition.fhirVersion"/>       <short value="FHIR Version this StructureDefinition targets"/>       <definition value="The version of the FHIR specification on which this StructureDefinition is based

       - this is the formal version of the specification, without the revision number,
       e.g. [publication].[major].[minor], which is 4.6.0. for this version."/> 
      <comment value="A StructureDefinition does not need to specify the target it applies to as StructureDefinitio

      ns will often be valid across multiple versions of FHIR. FHIR tooling can determine
       whether a StructureDefinition is consistent with a particular StructureDefinition
       if desired."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.fhirVersion"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="code"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="FHIRVersion"/>         </extension>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-isCommonBinding">          <valueBoolean value="true"/>         </extension>         <strength value="required"/>         <description value="All published FHIR Versions."/>         <valueSet value="http://hl7.org/fhir/ValueSet/FHIR-version|5.0.0"/>       </binding>     </element>     <element id="StructureDefinition.mapping">      <path value="StructureDefinition.mapping"/>       <short value="External specification that the content is mapped to"/>       <definition value="An external specification that the content is mapped to."/>       <min value="0"/>       <max value="*"/>       <base>         <path value="StructureDefinition.mapping"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="BackboneElement"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="sdf-2"/>         <severity value="error"/>         <human value="Must have at least a name or a uri (or both)"/>         <expression value="name.exists() or uri.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.mapping.id">      <path value="StructureDefinition.mapping.id"/>       <representation value="xmlAttr"/>       <short value="Unique id for inter-element referencing"/>       <definition value="Unique id for the element within a resource (for internal references). This may

       be any string value that does not contain spaces."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="Element.id"/>         <min value="0"/>         <max value="1"/>       </base>       <!--  Note: special primitive values have a FHIRPath system type. e.g. this is compiler

       magic (j)  -->
      <type>         <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">          <valueUrl value="string"/>         </extension>         <code value="http://hl7.org/fhirpath/System.String"/>       </type>       <condition value="ele-1"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="n/a"/>       </mapping>     </element>     <element id="StructureDefinition.mapping.extension">      <path value="StructureDefinition.mapping.extension"/>       <short value="Additional content defined by implementations"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the element. To make the use of extensions safe and manageable, there is a strict set
       of governance  applied to the definition and use of extensions. Though any implementer
       can define an extension, there is a set of requirements that SHALL be met as part of the
       definition of the extension.
      There can be no stigma associated with the use of extensions by any application, project,
       or standard - regardless of the institution or jurisdiction that uses or defines the extensions.
        The use of extensions is what allows the FHIR specification to retain a core level of
       simplicity for everyone.
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      
      
        
        
      
    
    
      
      

       of the element. To make the use of extensions safe and managable, there is a strict
       set of governance applied to the definition and use of extensions. Though any implementer
       can define an extension, there is a set of requirements that SHALL be met as part
       of the definition of the extension."/> 
      <comment value="There can be no stigma associated with the use of extensions by any application,

       project, or standard - regardless of the institution or jurisdiction that uses
       or defines the extensions.  The use of extensions is what allows the FHIR specification
       to retain a core level of simplicity for everyone."/> 
      <alias value="extensions"/>       <alias value="user content"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="Element.extension"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Extension"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="ext-1"/>         <severity value="error"/>         <human value="Must have either extensions or value[x], not both"/>         <expression value="extension.exists() != value.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>       </constraint>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="n/a"/>       </mapping>     </element>     <element id="StructureDefinition.mapping.modifierExtension">      <path value="StructureDefinition.mapping.modifierExtension"/>       <short value="Extensions that cannot be ignored even if unrecognized"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the element and that modifies the understanding of the element in which it is contained
       and/or the understanding of the containing element's descendants. Usually modifier elements
       provide negation or qualification. To make the use of extensions safe and manageable,
       there is a strict set of governance applied to the definition and use of extensions. Though
       any implementer can define an extension, there is a set of requirements that SHALL be
       met as part of the definition of the extension. Applications processing a resource are
       required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource
       (including cannot change the meaning of modifierExtension itself).
      There can be no stigma associated with the use of extensions by any application, project,
       or standard - regardless of the institution or jurisdiction that uses or defines the extensions.
        The use of extensions is what allows the FHIR specification to retain a core level of
       simplicity for everyone.
      Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly
       distinguished from the vast majority of extensions which can be safely ignored.  This
       promotes interoperability by eliminating the need for implementers to prohibit the presence
       of extensions. For further information, see the [definition of modifier extensions](extensibility.ht
      ml#modifierExtension).
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      Modifier extensions are expected to modify the meaning or interpretation of the element
       that contains them
      
      
        
        
      
    
    
      
      
      

       of the element and that modifies the understanding of the element in which it is
       contained and/or the understanding of the containing element's descendants. Usually
       modifier elements provide negation or qualification. To make the use of extensions
       safe and managable, there is a strict set of governance applied to the definition
       and use of extensions. Though any implementer can define an extension, there is
       a set of requirements that SHALL be met as part of the definition of the extension.
       Applications processing a resource are required to check for modifier extensions.
Modifier extensions SHALL NOT change the meaning of any elements on Resource or
       DomainResource (including cannot change the meaning of modifierExtension itself)."/> 
      <comment value="There can be no stigma associated with the use of extensions by any application,

       project, or standard - regardless of the institution or jurisdiction that uses
       or defines the extensions.  The use of extensions is what allows the FHIR specification
       to retain a core level of simplicity for everyone."/> 
      <requirements value="Modifier extensions allow for extensions that *cannot* be safely ignored to be

       clearly distinguished from the vast majority of extensions which can be safely
       ignored.  This promotes interoperability by eliminating the need for implementers
       to prohibit the presence of extensions. For further information, see the [definition
       of modifier extensions](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/>       <alias value="user content"/>       <alias value="modifiers"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="BackboneElement.modifierExtension"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Extension"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="ext-1"/>         <severity value="error"/>         <human value="Must have either extensions or value[x], not both"/>         <expression value="extension.exists() != value.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>       </constraint>       <isModifier value="true"/>       <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the

       element that contains them"/> 
      <isSummary value="true"/>       <mapping>         <identity value="rim"/>         <map value="N/A"/>       </mapping>     </element>     <element id="StructureDefinition.mapping.identity">      <path value="StructureDefinition.mapping.identity"/>       <short value="Internal id when this mapping is used"/>       <definition value="An Internal id that is used to identify this mapping set when specific mappings

       are made."/> 

      <comment value="The specification is described once, with general comments, and then specific mappings
       are made that reference this declaration.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      
      
      
      
      
        
        
        
      
      
        
      
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      
      
      
      
        
        
        
      
      
        
      
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      Comments about this mapping, including version notes, issues, scope limitations, and other
       important notes for usage.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
          
        
        
        
        
      
    
    
      
      
      Whether structure this definition describes is abstract or not  - that is, whether the
       structure is not intended to be instantiated. For Resources and Data types, abstract types
       will never be exchanged  between systems.

       are made that reference this declaration."/> 
      <min value="1"/>       <max value="1"/>       <base>         <path value="StructureDefinition.mapping.identity"/>         <min value="1"/>         <max value="1"/>       </base>       <type>         <code value="id"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.mapping.uri">      <path value="StructureDefinition.mapping.uri"/>       <short value="Identifies what this mapping refers to"/>       <definition value="An absolute URI that identifies the specification that this mapping is expressed

       to."/> 
      <comment value="A formal identity for the specification being mapped to helps with identifying

       maps consistently."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.mapping.uri"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="uri"/>       </type>       <condition value="sdf-2"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.mapping.name">      <path value="StructureDefinition.mapping.name"/>       <short value="Names what this mapping refers to"/>       <definition value="A name for the specification that is being mapped to."/>       <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.mapping.name"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="string"/>       </type>       <condition value="sdf-2"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.mapping.comment">      <path value="StructureDefinition.mapping.comment"/>       <short value="Versions, Issues, Scope limitations etc"/>       <definition value="Comments about this mapping, including version notes, issues, scope limitations,

       and other important notes for usage."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.mapping.comment"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="string"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.kind">      <path value="StructureDefinition.kind"/>       <short value="primitive-type | complex-type | resource | logical"/>       <definition value="Defines the kind of structure that this definition is describing."/>       <min value="1"/>       <max value="1"/>       <base>         <path value="StructureDefinition.kind"/>         <min value="1"/>         <max value="1"/>       </base>       <type>         <code value="code"/>       </type>       <condition value="sdf-15a"/>       <condition value="sdf-15"/>       <condition value="sdf-11"/>       <condition value="sdf-29"/>       <condition value="sdf-8"/>       <condition value="sdf-3"/>       <condition value="sdf-8a"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="StructureDefinitionKind"/>         </extension>         <strength value="required"/>         <description value="Defines the type of structure that a definition is describing."/>         <valueSet value="http://hl7.org/fhir/ValueSet/structure-definition-kind|5.0.0"/>       </binding>     </element>     <element id="StructureDefinition.abstract">      <path value="StructureDefinition.abstract"/>       <short value="Whether the structure is abstract"/>       <definition value="Whether structure this definition describes is abstract or not  - that is, whether

       the structure is not intended to be instantiated. For Resources and Data types,
       abstract types will never be exchanged  between systems."/> 

      <comment value="Abstract Resources cannot be instantiated - a concrete sub-type must be used. Abstract
       datatypes and extensions cannot be used in an instance. For logical models, the exact
       implication of &quot;abstract&quot; will rest with the author, depending how the logical
       model is used. Flagging a constraint structure as abstract conveys design intent but makes
       no difference to how the structure definition is handled. Note that inline declared elements
       that are given the type &quot;Element&quot; in the StructureDefinition, but have children
       described, are anonymous concrete types that specialize Element.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      
      
      
      
        
        
        
      
      
        
      
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      
      Unique id for the element within a resource (for internal references). This may be any
       string value that does not contain spaces.
      
      
      
        
        
        
      
      
        
          
        
        
      
      
      
      
        
        
      
    
    
      
      

       datatypes and extensions cannot be used in an instance. For logical models, the
       exact implication of &quot;abstract&quot; will rest with the author, depending
       how the logical model is used. Flagging a constraint structure as abstract conveys
       design intent but makes no difference to how the structure definition is handled.
       Note that inline declared elements that are given the type &quot;Element&quot;
       in the StructureDefinition, but have children described, are anonymous concrete
       types that specialize Element."/> 
      <min value="1"/>       <max value="1"/>       <base>         <path value="StructureDefinition.abstract"/>         <min value="1"/>         <max value="1"/>       </base>       <type>         <code value="boolean"/>       </type>       <condition value="sdf-4"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.context">      <path value="StructureDefinition.context"/>       <short value="If an extension, where it can be used in instances"/>       <definition value="Identifies the types of resource or data type elements to which the extension can

       be applied. For more guidance on using the 'context' element, see the [defining
       extensions page](defining-extensions.html#context)."/> 
      <min value="0"/>       <max value="*"/>       <base>         <path value="StructureDefinition.context"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="BackboneElement"/>       </type>       <condition value="sdf-5"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.context.id">      <path value="StructureDefinition.context.id"/>       <representation value="xmlAttr"/>       <short value="Unique id for inter-element referencing"/>       <definition value="Unique id for the element within a resource (for internal references). This may

       be any string value that does not contain spaces."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="Element.id"/>         <min value="0"/>         <max value="1"/>       </base>       <!--  Note: special primitive values have a FHIRPath system type. e.g. this is compiler

       magic (j)  -->
      <type>         <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">          <valueUrl value="string"/>         </extension>         <code value="http://hl7.org/fhirpath/System.String"/>       </type>       <condition value="ele-1"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="n/a"/>       </mapping>     </element>     <element id="StructureDefinition.context.extension">      <path value="StructureDefinition.context.extension"/>       <short value="Additional content defined by implementations"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the element. To make the use of extensions safe and manageable, there is a strict set
       of governance  applied to the definition and use of extensions. Though any implementer
       can define an extension, there is a set of requirements that SHALL be met as part of the
       definition of the extension.
      There can be no stigma associated with the use of extensions by any application, project,
       or standard - regardless of the institution or jurisdiction that uses or defines the extensions.
        The use of extensions is what allows the FHIR specification to retain a core level of
       simplicity for everyone.
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      
      
        
        
      
    
    
      
      

       of the element. To make the use of extensions safe and managable, there is a strict
       set of governance applied to the definition and use of extensions. Though any implementer
       can define an extension, there is a set of requirements that SHALL be met as part
       of the definition of the extension."/> 
      <comment value="There can be no stigma associated with the use of extensions by any application,

       project, or standard - regardless of the institution or jurisdiction that uses
       or defines the extensions.  The use of extensions is what allows the FHIR specification
       to retain a core level of simplicity for everyone."/> 
      <alias value="extensions"/>       <alias value="user content"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="Element.extension"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Extension"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="ext-1"/>         <severity value="error"/>         <human value="Must have either extensions or value[x], not both"/>         <expression value="extension.exists() != value.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>       </constraint>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="n/a"/>       </mapping>     </element>     <element id="StructureDefinition.context.modifierExtension">      <path value="StructureDefinition.context.modifierExtension"/>       <short value="Extensions that cannot be ignored even if unrecognized"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the element and that modifies the understanding of the element in which it is contained
       and/or the understanding of the containing element's descendants. Usually modifier elements
       provide negation or qualification. To make the use of extensions safe and manageable,
       there is a strict set of governance applied to the definition and use of extensions. Though
       any implementer can define an extension, there is a set of requirements that SHALL be
       met as part of the definition of the extension. Applications processing a resource are
       required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource
       (including cannot change the meaning of modifierExtension itself).
      There can be no stigma associated with the use of extensions by any application, project,
       or standard - regardless of the institution or jurisdiction that uses or defines the extensions.
        The use of extensions is what allows the FHIR specification to retain a core level of
       simplicity for everyone.
      Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly
       distinguished from the vast majority of extensions which can be safely ignored.  This
       promotes interoperability by eliminating the need for implementers to prohibit the presence
       of extensions. For further information, see the [definition of modifier extensions](extensibility.ht
      ml#modifierExtension).
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      Modifier extensions are expected to modify the meaning or interpretation of the element
       that contains them
      
      
        
        
      
    
    
      
      

       of the element and that modifies the understanding of the element in which it is
       contained and/or the understanding of the containing element's descendants. Usually
       modifier elements provide negation or qualification. To make the use of extensions
       safe and managable, there is a strict set of governance applied to the definition
       and use of extensions. Though any implementer can define an extension, there is
       a set of requirements that SHALL be met as part of the definition of the extension.
       Applications processing a resource are required to check for modifier extensions.
Modifier extensions SHALL NOT change the meaning of any elements on Resource or
       DomainResource (including cannot change the meaning of modifierExtension itself)."/> 
      <comment value="There can be no stigma associated with the use of extensions by any application,

       project, or standard - regardless of the institution or jurisdiction that uses
       or defines the extensions.  The use of extensions is what allows the FHIR specification
       to retain a core level of simplicity for everyone."/> 
      <requirements value="Modifier extensions allow for extensions that *cannot* be safely ignored to be

       clearly distinguished from the vast majority of extensions which can be safely
       ignored.  This promotes interoperability by eliminating the need for implementers
       to prohibit the presence of extensions. For further information, see the [definition
       of modifier extensions](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/>       <alias value="user content"/>       <alias value="modifiers"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="BackboneElement.modifierExtension"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Extension"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="ext-1"/>         <severity value="error"/>         <human value="Must have either extensions or value[x], not both"/>         <expression value="extension.exists() != value.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>       </constraint>       <isModifier value="true"/>       <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the

       element that contains them"/> 
      <isSummary value="true"/>       <mapping>         <identity value="rim"/>         <map value="N/A"/>       </mapping>     </element>     <element id="StructureDefinition.context.type">      <path value="StructureDefinition.context.type"/>       <short value="fhirpath | element | extension"/> 
      <definition value="Defines how to interpret the expression that defines what the context of the extension
       is.
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
          
        
        
        
        
      
    
    
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      A set of rules as FHIRPath Invariants about when the extension can be used (e.g. co-occurrence
       variants for the extension). All the rules must be true.
      The rules are only evaluated when the extension is present. When evaluating the invariant,
       the FHIRPath focus is the element that holds the extension, and %extension refers to the
       extension itself.
      
      
      
        
        
        
      
      
        
      
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      The type this structure describes. If the derivation kind is 'specialization' then this
       is the master definition for a type, and there is always one of these (a data type, an
       extension, a resource, including abstract ones). Otherwise the structure definition is
       a constraint on the stated type (and in this case, the type cannot be an abstract type).
        References are URLs that are relative to http://hl7.org/fhir/StructureDefinition e.g.
       &quot;string&quot; is a reference to http://hl7.org/fhir/StructureDefinition/string. Absolute
       URLs are only allowed in logical models.

       is."/> 
      <min value="1"/>       <max value="1"/>       <base>         <path value="StructureDefinition.context.type"/>         <min value="1"/>         <max value="1"/>       </base>       <type>         <code value="code"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="ExtensionContextType"/>         </extension>         <strength value="required"/>         <description value="How an extension context is interpreted."/>         <valueSet value="http://hl7.org/fhir/ValueSet/extension-context-type|5.0.0"/>       </binding>     </element>     <element id="StructureDefinition.context.expression">      <path value="StructureDefinition.context.expression"/>       <short value="Where the extension can be used in instances"/>       <definition value="An expression that defines where an extension can be used in resources."/>       <min value="1"/>       <max value="1"/>       <base>         <path value="StructureDefinition.context.expression"/>         <min value="1"/>         <max value="1"/>       </base>       <type>         <code value="string"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.contextInvariant">      <path value="StructureDefinition.contextInvariant"/>       <short value="FHIRPath invariants - when the extension can be used"/>       <definition value="A set of rules as FHIRPath Invariants about when the extension can be used (e.g.

       co-occurrence variants for the extension). All the rules must be true."/> 
      <comment value="The rules are only evaluated when the extension is present. When evaluating the

       invariant, the FHIRPath focus is the element that holds the extension, and %extension
       refers to the extension itself."/> 
      <min value="0"/>       <max value="*"/>       <base>         <path value="StructureDefinition.contextInvariant"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="string"/>       </type>       <condition value="sdf-18"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.type">      <path value="StructureDefinition.type"/>       <short value="Type defined or constrained by this structure"/>       <definition value="The type this structure describes. If the derivation kind is 'specialization' then

       this is the master definition for a type, and there is always one of these (a data
       type, an extension, a resource, including abstract ones). Otherwise the structure
       definition is a constraint on the stated type (and in this case, the type cannot
       be an abstract type).  References are URLs that are relative to http://hl7.org/fhir/Structure
      Definition e.g. &quot;string&quot; is a reference to http://hl7.org/fhir/StructureDefinition/s
      tring. Absolute URLs are only allowed in logical models, where they are required."/> 

      <comment value="Note that in the case of constraints, the type could be determined by chasing through
       the baseDefinition references until a concrete structure (derivation = specialization)
       is reached, or by looking at the path of the first element in the snapshot - if present
       - but providing the type directly makes for simpler tooling and indexing. 

The type must match the elements defined in the differential and the snapshot. For all
       FHIR defined types, the path name of the element will start with the type name. For logical
       models, where the type is a URL, the type name SHOULD start with the tail of the type
       URL where required.
      
      
      
        
        
        
      
      
        
      
      
      
        
        
        
        
        
        
      
      
      
      
      
        
          
        
        
          
        
        
        
        
      
    
    
      
      
      An absolute URI that is the base structure from which this type is derived, either by
       specialization or constraint.
      If differential constraints are specified in this structure, they are applied to the base
       in a &quot;differential&quot; fashion. If there is no base, then the differential constraints
       cannot be provided (snapshot only). Differential structures are useful for the editing
       perspective, and snapshot structures are suitable for operational use. The FHIR Project
       provides a number of tools/services to populate snapshots from differential constraints.
       Logical Models have a base of &quot;Element&quot; or another logical model.
      
      
      
        
        
        
      
      
        
          
        
        
        
      
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      
      If the definition is a specialization, then it adds new elements in the differential,
       and the snapshot includes the inherited elements.  If the definition is a constraint,

       the baseDefinition references until a type defining structure (derivation = specialization)
       is reached, or by looking at the path of the first element in the snapshot - if
       present - but providing the type directly makes for simpler tooling and indexing.
       
The type must match the elements defined in the differential and the snapshot.
       For all FHIR defined types, the path name of the element will start with the type
       name. For logical models, where the type SHALL be a fully specified URL, the type
       name SHOULD start with the final path segment of the type URL where required. E.g.
       If the type was &quot;http://example.org/fhir/MyLogicalModelType&quot;, the type
       name should start with 'MyLogicalModelType'."/> 
      <min value="1"/>       <max value="1"/>       <base>         <path value="StructureDefinition.type"/>         <min value="1"/>         <max value="1"/>       </base>       <type>         <code value="uri"/>       </type>       <condition value="sdf-18"/>       <condition value="sdf-11"/>       <condition value="sdf-5"/>       <condition value="sdf-8"/>       <condition value="sdf-8a"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="FHIRTypes"/>         </extension>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-isCommonBinding">          <valueBoolean value="true"/>         </extension>         <strength value="extensible"/>         <description value="Either a resource or a data type, including logical model types."/>         <valueSet value="http://hl7.org/fhir/ValueSet/fhir-types"/>       </binding>     </element>     <element id="StructureDefinition.baseDefinition">      <path value="StructureDefinition.baseDefinition"/>       <short value="Definition that this type is constrained/specialized from"/>       <definition value="An absolute URI that is the base structure from which this type is derived, either

       by specialization or constraint."/> 
      <comment value="If differential constraints are specified in this structure, they are applied to

       the base in a &quot;differential&quot; fashion. If there is no base, then the differential
       constraints cannot be provided (snapshot only). Differential structures are useful
       for the editing perspective, and snapshot structures are suitable for operational
       use. The FHIR Project provides a number of tools/services to populate snapshots
       from differential constraints. Logical Models have a base of &quot;Base&quot;,
       &quot;Element&quot; or another logical model."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.baseDefinition"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy">          <valueBoolean value="true"/>         </extension>         <code value="canonical"/>         <targetProfile value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </type>       <condition value="sdf-4"/>       <condition value="sdf-27"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.derivation">      <path value="StructureDefinition.derivation"/>       <short value="specialization | constraint - How relates to base definition"/>       <definition value="How the type relates to the baseDefinition."/>       <comment value="If the definition is a specialization, then it adds to the differential new elements

       and optionally additional rules to an existing concrete type, and the snapshot
       includes the inherited elements and rules.  If the definition is a constraint,

       then it cannot define new elements, it can only make new rules about existing content
       (see [Profiling Resources](profiling.html#resources)).
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
          
        
        
        
        
      
    
    
      
      
      A snapshot view is expressed in a standalone form that can be used and interpreted without
       considering the base StructureDefinition.
      
      
      
        
        
        
      
      
        
      
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
        
        
        All snapshot elements must start with the StructureDefinition's specified type for non-logical
         models, or with the same type name for logical models
        (%resource.kind = 'logical' or element.first().path = %resource.type) and element.tail().all(path.st
        artsWith(%resource.snapshot.element.first().path&amp;'.'))
        f:element[1]/f:path/@value=parent::f:StructureDefinition/f:type/@value and count(f:element[position(
        )!=1])=count(f:element[position()!=1][starts-with(f:path/@value, concat(ancestor::f:StructureDefiniti
        on/f:type/@value, '.'))])
        
      
      
        
        

       (see [Profiling Resources](profiling.html#resources))."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.derivation"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="code"/>       </type>       <condition value="sdf-1"/>       <condition value="sdf-21"/>       <condition value="sdf-5"/>       <condition value="sdf-27"/>       <condition value="sdf-29"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="TypeDerivationRule"/>         </extension>         <strength value="required"/>         <description value="How a type relates to its baseDefinition."/>         <valueSet value="http://hl7.org/fhir/ValueSet/type-derivation-rule|5.0.0"/>       </binding>     </element>     <element id="StructureDefinition.snapshot">      <path value="StructureDefinition.snapshot"/>       <short value="Snapshot view of the structure"/>       <definition value="A snapshot view is expressed in a standalone form that can be used and interpreted

       without considering the base StructureDefinition."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.snapshot"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="BackboneElement"/>       </type>       <condition value="sdf-11"/>       <condition value="sdf-1"/>       <condition value="sdf-6"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="sdf-3"/>         <severity value="error"/>         <human value="Each element definition in a snapshot must have a formal definition and cardinalities,

         unless model is a logical model"/> 
        <expression value="%resource.kind = 'logical' or element.all(definition.exists() and min.exists()

         and max.exists())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-8"/>         <severity value="error"/>         <human value="All snapshot elements must start with the StructureDefinition's specified type

         for non-logical models, or with the same type name for logical models"/> 
        <expression value="(%resource.kind = 'logical' or element.first().path = %resource.type) and element.tail().all(

        path.startsWith(%resource.snapshot.element.first().path&amp;'.'))"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-24"/>         <severity value="error"/> 
        <human value="For CodeableReference elements, target profiles must be listed on the CodeableReference,
         not the CodeableReference.reference
        element.where(type.code='Reference' and id.endsWith('.reference') and type.targetProfile.exists()
         and id.substring(0,$this.length()-10) in %context.element.where(type.code='CodeableReference').id).e
        xists().not()
        not(exists(for $cr in f:element[f:type/f:code/@value='CodeableReference'] return $cr/following-sibli
        ng::f:element[@id=concat($cr/@id, '.reference') and f:type/f:code/@value='Reference' and
         exists(f:type/f:targetProfile)]))
        
      
      
        
        
        For CodeableReference elements, bindings must be listed on the CodeableReference, not
         the CodeableReference.concept
        element.where(type.code='CodeableConcept' and id.endsWith('.concept') and binding.exists()
         and id.substring(0,$this.length()-8) in %context.element.where(type.code='CodeableReference').id).ex
        ists().not()
        not(exists(for $cr in f:element[f:type/f:code/@value='CodeableReference'] return $cr/following-sibli
        ng::f:element[@id=concat($cr/@id, '.concept') and f:type/f:code/@value='CodeableConcept'
         and exists(f:binding)]))
        
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      
      Unique id for the element within a resource (for internal references). This may be any
       string value that does not contain spaces.
      
      
      
        
        
        
      
      
        
          
        
        
      
      
      
      
        
        
      
    
    
      
      

         not the CodeableReference.reference"/> 
        <expression value="element.where(type.where(code='Reference').exists() and path.endsWith('.reference')

         and type.targetProfile.exists() and (path.substring(0,$this.path.length()-10) in
         %context.element.where(type.where(code='CodeableReference').exists()).path)).exists().not()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-25"/>         <severity value="error"/>         <human value="For CodeableReference elements, bindings must be listed on the CodeableReference,

         not the CodeableReference.concept"/> 
        <expression value="element.where(type.where(code='CodeableConcept').exists() and path.endsWith('.concept')

         and binding.exists() and (path.substring(0,$this.path.length()-8) in %context.element.where(t
        ype.where(code='CodeableReference').exists()).path)).exists().not()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice">          <valueBoolean value="true"/>         </extension>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice-explanation">          <valueMarkdown value="It is bad practice to set the root element of a profile to 'mustSupport' as mustSupport

           should always be determined by the element referencing a type.  The designer of
           a StructureDefinition cannot know all circumstances in which a type or profile
           might be used"/> 
        </extension>         <key value="sdf-26"/>         <severity value="warning"/>         <human value="The root element of a profile should not have mustSupport = true"/>         <expression value="$this.where(element[0].mustSupport='true').exists().not()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-8b"/>         <severity value="error"/>         <human value="All snapshot elements must have a base definition"/>         <expression value="element.all(base.exists())"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.snapshot.id">      <path value="StructureDefinition.snapshot.id"/>       <representation value="xmlAttr"/>       <short value="Unique id for inter-element referencing"/>       <definition value="Unique id for the element within a resource (for internal references). This may

       be any string value that does not contain spaces."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="Element.id"/>         <min value="0"/>         <max value="1"/>       </base>       <!--  Note: special primitive values have a FHIRPath system type. e.g. this is compiler

       magic (j)  -->
      <type>         <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">          <valueUrl value="string"/>         </extension>         <code value="http://hl7.org/fhirpath/System.String"/>       </type>       <condition value="ele-1"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="n/a"/>       </mapping>     </element>     <element id="StructureDefinition.snapshot.extension">      <path value="StructureDefinition.snapshot.extension"/>       <short value="Additional content defined by implementations"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the element. To make the use of extensions safe and manageable, there is a strict set
       of governance  applied to the definition and use of extensions. Though any implementer
       can define an extension, there is a set of requirements that SHALL be met as part of the
       definition of the extension.
      There can be no stigma associated with the use of extensions by any application, project,
       or standard - regardless of the institution or jurisdiction that uses or defines the extensions.
        The use of extensions is what allows the FHIR specification to retain a core level of
       simplicity for everyone.
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      
      
        
        
      
    
    
      
      

       of the element. To make the use of extensions safe and managable, there is a strict
       set of governance applied to the definition and use of extensions. Though any implementer
       can define an extension, there is a set of requirements that SHALL be met as part
       of the definition of the extension."/> 
      <comment value="There can be no stigma associated with the use of extensions by any application,

       project, or standard - regardless of the institution or jurisdiction that uses
       or defines the extensions.  The use of extensions is what allows the FHIR specification
       to retain a core level of simplicity for everyone."/> 
      <alias value="extensions"/>       <alias value="user content"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="Element.extension"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Extension"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="ext-1"/>         <severity value="error"/>         <human value="Must have either extensions or value[x], not both"/>         <expression value="extension.exists() != value.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>       </constraint>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="n/a"/>       </mapping>     </element>     <element id="StructureDefinition.snapshot.modifierExtension">      <path value="StructureDefinition.snapshot.modifierExtension"/>       <short value="Extensions that cannot be ignored even if unrecognized"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the element and that modifies the understanding of the element in which it is contained
       and/or the understanding of the containing element's descendants. Usually modifier elements
       provide negation or qualification. To make the use of extensions safe and manageable,
       there is a strict set of governance applied to the definition and use of extensions. Though
       any implementer can define an extension, there is a set of requirements that SHALL be
       met as part of the definition of the extension. Applications processing a resource are
       required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource
       (including cannot change the meaning of modifierExtension itself).
      There can be no stigma associated with the use of extensions by any application, project,
       or standard - regardless of the institution or jurisdiction that uses or defines the extensions.
        The use of extensions is what allows the FHIR specification to retain a core level of
       simplicity for everyone.
      Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly
       distinguished from the vast majority of extensions which can be safely ignored.  This
       promotes interoperability by eliminating the need for implementers to prohibit the presence
       of extensions. For further information, see the [definition of modifier extensions](extensibility.ht
      ml#modifierExtension).
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      Modifier extensions are expected to modify the meaning or interpretation of the element
       that contains them
      
      
        
        
      
    
    
      
      
      
      
      
      
        
        
        
      
      
        
      
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
        
      
      
      
      
      
        
        
      
    
    
      
      

       of the element and that modifies the understanding of the element in which it is
       contained and/or the understanding of the containing element's descendants. Usually
       modifier elements provide negation or qualification. To make the use of extensions
       safe and managable, there is a strict set of governance applied to the definition
       and use of extensions. Though any implementer can define an extension, there is
       a set of requirements that SHALL be met as part of the definition of the extension.
       Applications processing a resource are required to check for modifier extensions.
Modifier extensions SHALL NOT change the meaning of any elements on Resource or
       DomainResource (including cannot change the meaning of modifierExtension itself)."/> 
      <comment value="There can be no stigma associated with the use of extensions by any application,

       project, or standard - regardless of the institution or jurisdiction that uses
       or defines the extensions.  The use of extensions is what allows the FHIR specification
       to retain a core level of simplicity for everyone."/> 
      <requirements value="Modifier extensions allow for extensions that *cannot* be safely ignored to be

       clearly distinguished from the vast majority of extensions which can be safely
       ignored.  This promotes interoperability by eliminating the need for implementers
       to prohibit the presence of extensions. For further information, see the [definition
       of modifier extensions](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/>       <alias value="user content"/>       <alias value="modifiers"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="BackboneElement.modifierExtension"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Extension"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="ext-1"/>         <severity value="error"/>         <human value="Must have either extensions or value[x], not both"/>         <expression value="extension.exists() != value.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>       </constraint>       <isModifier value="true"/>       <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the

       element that contains them"/> 
      <isSummary value="true"/>       <mapping>         <identity value="rim"/>         <map value="N/A"/>       </mapping>     </element>     <element id="StructureDefinition.snapshot.element">      <path value="StructureDefinition.snapshot.element"/>       <short value="Definition of elements in the resource (if no StructureDefinition)"/>       <definition value="Captures constraints on each element within the resource."/>       <min value="1"/>       <max value="*"/>       <base>         <path value="StructureDefinition.snapshot.element"/>         <min value="1"/>         <max value="*"/>       </base>       <type>         <code value="ElementDefinition"/>       </type>       <condition value="sdf-9"/>       <condition value="sdf-19"/>       <condition value="sdf-16"/>       <condition value="sdf-15"/>       <condition value="sdf-23"/>       <condition value="sdf-11"/>       <condition value="sdf-22"/>       <condition value="sdf-14"/>       <condition value="sdf-1"/>       <condition value="sdf-8"/>       <condition value="sdf-3"/>       <condition value="sdf-8b"/>       <condition value="sdf-24"/>       <condition value="sdf-25"/>       <condition value="sdf-26"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="sdf-10"/>         <requirements value="binding is required"/>         <severity value="error"/>         <human value="provide either a binding reference or a description (or both)"/>         <expression value="binding.empty() or binding.valueSet.exists() or binding.description.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-28"/>         <severity value="error"/>         <human value="If there are no discriminators, there must be a definition"/>         <expression value="slicing.exists().not() or (slicing.discriminator.exists() or slicing.description.exists())"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="iso11179"/>         <map value="--"/>       </mapping>     </element>     <element id="StructureDefinition.differential">      <path value="StructureDefinition.differential"/>       <short value="Differential view of the structure"/> 
      <definition value="A differential view is expressed relative to the base StructureDefinition - a statement
       of differences that it applies.
      
      
      
        
        
        
      
      
        
      
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
        
      
      
        
        
        In any differential, all the elements must start with the StructureDefinition's specified
         type for non-logical models, or with the same type name for logical models
        (%resource.kind = 'logical' or element.first().path.startsWith(%resource.type)) and (element.tail().
        empty() or element.tail().all(path.startsWith(%resource.differential.element.first().path.replaceMatc
        hes('\\..*','')&amp;'.')))
        count(f:element)=count(f:element[f:path/@value=ancestor::f:StructureDefinition/f:type/@value
         or starts-with(f:path/@value, concat(ancestor::f:StructureDefinition/f:type/@value, '.'))])
        
      
      
      
      
    
    
      
      
      
      Unique id for the element within a resource (for internal references). This may be any
       string value that does not contain spaces.
      
      
      
        
        
        
      
      
        
          
        
        
      
      
      
      
        
        
      
    
    
      
      

       of differences that it applies."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="StructureDefinition.differential"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="BackboneElement"/>       </type>       <condition value="sdf-6"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="sdf-20"/>         <requirements value="no slicing on root"/>         <severity value="error"/>         <human value="No slicing on the root element"/>         <expression value="element.where(path.contains('.').not()).slicing.empty()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-8a"/>         <severity value="error"/>         <human value="In any differential, all the elements must start with the StructureDefinition's

         specified type for non-logical models, or with the same type name for logical models"/> 
        <expression value="(%resource.kind = 'logical' or element.first().path.startsWith(%resource.type))

         and (element.tail().empty() or  element.tail().all(path.startsWith(%resource.differential.ele
        ment.first().path.replaceMatches('\\..*','')&amp;'.')))"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.differential.id">      <path value="StructureDefinition.differential.id"/>       <representation value="xmlAttr"/>       <short value="Unique id for inter-element referencing"/>       <definition value="Unique id for the element within a resource (for internal references). This may

       be any string value that does not contain spaces."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="Element.id"/>         <min value="0"/>         <max value="1"/>       </base>       <!--  Note: special primitive values have a FHIRPath system type. e.g. this is compiler

       magic (j)  -->
      <type>         <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">          <valueUrl value="string"/>         </extension>         <code value="http://hl7.org/fhirpath/System.String"/>       </type>       <condition value="ele-1"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="n/a"/>       </mapping>     </element>     <element id="StructureDefinition.differential.extension">      <path value="StructureDefinition.differential.extension"/>       <short value="Additional content defined by implementations"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the element. To make the use of extensions safe and manageable, there is a strict set
       of governance  applied to the definition and use of extensions. Though any implementer
       can define an extension, there is a set of requirements that SHALL be met as part of the
       definition of the extension.
      There can be no stigma associated with the use of extensions by any application, project,
       or standard - regardless of the institution or jurisdiction that uses or defines the extensions.
        The use of extensions is what allows the FHIR specification to retain a core level of
       simplicity for everyone.
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      
      
        
        
      
    
    
      
      

       of the element. To make the use of extensions safe and managable, there is a strict
       set of governance applied to the definition and use of extensions. Though any implementer
       can define an extension, there is a set of requirements that SHALL be met as part
       of the definition of the extension."/> 
      <comment value="There can be no stigma associated with the use of extensions by any application,

       project, or standard - regardless of the institution or jurisdiction that uses
       or defines the extensions.  The use of extensions is what allows the FHIR specification
       to retain a core level of simplicity for everyone."/> 
      <alias value="extensions"/>       <alias value="user content"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="Element.extension"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Extension"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="ext-1"/>         <severity value="error"/>         <human value="Must have either extensions or value[x], not both"/>         <expression value="extension.exists() != value.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>       </constraint>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="n/a"/>       </mapping>     </element>     <element id="StructureDefinition.differential.modifierExtension">      <path value="StructureDefinition.differential.modifierExtension"/>       <short value="Extensions that cannot be ignored even if unrecognized"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the element and that modifies the understanding of the element in which it is contained
       and/or the understanding of the containing element's descendants. Usually modifier elements
       provide negation or qualification. To make the use of extensions safe and manageable,
       there is a strict set of governance applied to the definition and use of extensions. Though
       any implementer can define an extension, there is a set of requirements that SHALL be
       met as part of the definition of the extension. Applications processing a resource are
       required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource
       (including cannot change the meaning of modifierExtension itself).
      There can be no stigma associated with the use of extensions by any application, project,
       or standard - regardless of the institution or jurisdiction that uses or defines the extensions.
        The use of extensions is what allows the FHIR specification to retain a core level of
       simplicity for everyone.
      Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly
       distinguished from the vast majority of extensions which can be safely ignored.  This
       promotes interoperability by eliminating the need for implementers to prohibit the presence
       of extensions. For further information, see the [definition of modifier extensions](extensibility.ht
      ml#modifierExtension).
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      Modifier extensions are expected to modify the meaning or interpretation of the element
       that contains them
      
      
        
        
      
    
    
      
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
      
        
        
      
    
  
  
    
      
      
      A definition of a FHIR structure. This resource is used to describe the underlying resources,
       data types defined in FHIR, and also for describing extensions and constraints on resources
       and data types.
      
      
      
      
      
        
        Because these 3 fields seem to be have overlapping meaning with the ones in the root of
         StructureDefinition
        
        In any snapshot or differential, no label, code or requirements on an element without
         a &quot;.&quot; in the path (e.g. the first element)
        children().element.where(path.contains('.').not()).label.empty() and children().element.where(path.c
        ontains('.').not()).code.empty() and children().element.where(path.contains('.').not()).requirements.
        empty()
        not(exists(f:snapshot/f:element[not(contains(f:path/@value, '.')) and (f:label or f:code
         or f:requirements)])) and not(exists(f:differential/f:element[not(contains(f:path/@value,
         '.')) and (f:label or f:code or f:requirements)]))
        
      
      
        
        
        
        If the first element in a differential has no &quot;.&quot; in the path and it's not a
         logical model, it has no type
        (kind!='logical'  and differential.element.first().path.contains('.').not()) implies differential.el
        ement.first().type.empty()
        f:kind/@value='logical' or not(f:differential/f:element[1][not(contains(f:path/@value,
         '.'))]/f:type)
        
      
      
        
        
        
        
        url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (differential.element.type.code.al
        l(matches('^[a-zA-Z0-9]+$') or matches('^http:\\/\\/hl7\\.org\\/fhirpath\\/System\\.[A-Z][A-Za-z]+$')
        ) and snapshot.element.type.code.all(matches('^[a-zA-Z0-9\\.]+$') or matches('^http:\\/\\/hl7\\.org\\
        /fhirpath\\/System\\.[A-Z][A-Za-z]+$')))
        not(starts-with(f:url/@value, 'http://hl7.org/fhir/StructureDefinition')) or count(f:differential/f:
        element/f:type/f:code[@value and not(matches(string(@value), '^[a-zA-Z0-9\.]+$'))]|f:snapshot/f:eleme
        nt/f:type/f:code[@value and not(matches(string(@value), '^[a-zA-Z0-9]+$\.'))]) =0
        
      
      
        
        
        
        
        
        count(f:snapshot/f:element)=count(f:snapshot/f:element/@id) and (count(f:snapshot/f:element)=count(d
        istinct-values(f:snapshot/f:element/@id)))
        
      
      
        
        
        
        
        
        
        
      
      
        
        
        
        
        
        
        
      
      
        
        
        
        
        
        count(f:differential/f:element)=count(f:differential/f:element/@id) and (count(f:differential/f:elem
        ent)=count(distinct-values(f:differential/f:element/@id)))
        
      
      
        
        
        
        
        
        count(*[self::snapshot or self::differential]/f:element[not(contains(f:path/@value, '.'))
         and f:sliceName])=0
        
      
      
        
        
        
        
        
        (f:kind/@value = 'logical') or not(exists(f:snapshot)) or (f:type/@value = f:snapshot/f:element[1]/f
        :path/@value)
        
      
      
        
        
        
        
        url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (snapshot.element.defaultValue.emp
        ty() and differential.element.defaultValue.empty())
        not(starts-with(f:url/@value, 'http://hl7.org/fhir/StructureDefinition')) or (not(exists(f:snapshot/
        f:element/*[starts-with(local-name(), 'defaultValue')])) and not(exists(f:differential/f:element/*[st
        arts-with(local-name(), 'defaultValue')])))
        
      
      
        
        
        
        
        
        
        
      
      
        
        
        
        
        (f:derivation/@value = 'constraint') or (count(f:snapshot/f:element) = count(distinct-values(f:snaps
        hot/f:element/f:path/@value)))
        
      
      
        
        
        
        
        
        not(exists(f:differential/f:element/*[starts-with(local-name(), 'defaultValue')])) or
         (f:derivation/@value = 'specialization')
        
      
      
        
        

       of the element and that modifies the understanding of the element in which it is
       contained and/or the understanding of the containing element's descendants. Usually
       modifier elements provide negation or qualification. To make the use of extensions
       safe and managable, there is a strict set of governance applied to the definition
       and use of extensions. Though any implementer can define an extension, there is
       a set of requirements that SHALL be met as part of the definition of the extension.
       Applications processing a resource are required to check for modifier extensions.
Modifier extensions SHALL NOT change the meaning of any elements on Resource or
       DomainResource (including cannot change the meaning of modifierExtension itself)."/> 
      <comment value="There can be no stigma associated with the use of extensions by any application,

       project, or standard - regardless of the institution or jurisdiction that uses
       or defines the extensions.  The use of extensions is what allows the FHIR specification
       to retain a core level of simplicity for everyone."/> 
      <requirements value="Modifier extensions allow for extensions that *cannot* be safely ignored to be

       clearly distinguished from the vast majority of extensions which can be safely
       ignored.  This promotes interoperability by eliminating the need for implementers
       to prohibit the presence of extensions. For further information, see the [definition
       of modifier extensions](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/>       <alias value="user content"/>       <alias value="modifiers"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="BackboneElement.modifierExtension"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Extension"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="ext-1"/>         <severity value="error"/>         <human value="Must have either extensions or value[x], not both"/>         <expression value="extension.exists() != value.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>       </constraint>       <isModifier value="true"/>       <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the

       element that contains them"/> 
      <isSummary value="true"/>       <mapping>         <identity value="rim"/>         <map value="N/A"/>       </mapping>     </element>     <element id="StructureDefinition.differential.element">      <path value="StructureDefinition.differential.element"/>       <short value="Definition of elements in the resource (if no StructureDefinition)"/>       <definition value="Captures constraints on each element within the resource."/>       <min value="1"/>       <max value="*"/>       <base>         <path value="StructureDefinition.differential.element"/>         <min value="1"/>         <max value="*"/>       </base>       <type>         <code value="ElementDefinition"/>       </type>       <condition value="sdf-9"/>       <condition value="sdf-15a"/>       <condition value="sdf-19"/>       <condition value="sdf-17"/>       <condition value="sdf-23"/>       <condition value="sdf-22"/>       <condition value="sdf-14"/>       <condition value="sdf-21"/>       <condition value="sdf-29"/>       <condition value="sdf-20"/>       <condition value="sdf-8a"/>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="iso11179"/>         <map value="--"/>       </mapping>     </element>   </snapshot>   <differential>     <element id="StructureDefinition">      <path value="StructureDefinition"/>       <short value="Structural Definition"/>       <definition value="A definition of a FHIR structure. This resource is used to describe the underlying

       resources, data types defined in FHIR, and also for describing extensions and constraints
       on resources and data types."/> 
      <alias value="Template"/>       <alias value="Profile"/>       <min value="0"/>       <max value="*"/>       <constraint>         <key value="cnl-0"/>         <severity value="warning"/> 
        <human value="Name should be usable as an identifier for the module by machine processing applications
         such as code generation
        
        
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
        
      
      
      
      
        
        
      
      
        
        
      
    
    
      
      

         such as code generation"/> 
        <expression value="name.exists() implies name.matches('^[A-Z]([A-Za-z0-9_]){1,254}$')"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-9"/>         <requirements value="Because these 3 fields seem to be have overlapping meaning with the ones in the

         root of StructureDefinition"/> 
        <severity value="error"/>         <human value="In any snapshot or differential, no label, code or requirements on an element without

         a &quot;.&quot; in the path (e.g. the first element)"/> 
        <expression value="children().element.where(path.contains('.').not()).label.empty() and children().element.where

        (path.contains('.').not()).code.empty() and children().element.where(path.contains('.').not())
        .requirements.empty()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-15a"/>         <requirements value="No Type on the root element (differential)"/>         <severity value="error"/>         <human value="If the first element in a differential has no &quot;.&quot; in the path and it's

         not a logical model, it has no type"/> 
        <expression value="(kind!='logical'  and differential.element.first().path.contains('.').not()) implies

         differential.element.first().type.empty()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-19"/>         <requirements value="custom types only in logical models"/>         <severity value="error"/>         <human value="FHIR Specification models only use FHIR defined types"/>         <expression value="url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (differential

         | snapshot).element.type.code.all(matches('^[a-zA-Z0-9]+$') or matches('^http:\\/\\/hl7\\.org
        \\/fhirpath\\/System\\.[A-Z][A-Za-z]+$'))"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-16"/>         <requirements value="element ids need to be unique"/>         <severity value="error"/>         <human value="All element definitions must have unique ids (snapshot)"/>         <expression value="snapshot.element.all(id.exists()) and snapshot.element.id.trace('ids').isDistinct()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-27"/>         <severity value="error"/>         <human value="If there's a base definition, there must be a derivation "/>         <expression value="baseDefinition.exists() implies derivation.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-15"/>         <requirements value="No Type on the root element (snapshot)"/>         <severity value="error"/>         <human value="The first element in a snapshot has no type unless model is a logical model."/>         <expression value="kind!='logical'  implies snapshot.element.first().type.empty()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-18"/>         <requirements value="contextInvariant"/>         <severity value="error"/>         <human value="Context Invariants can only be used for extensions"/>         <expression value="contextInvariant.exists() implies type = 'Extension'"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-29"/>         <severity value="warning"/>         <human value="Elements in Resources must have a min cardinality or 0 or 1 and a max cardinality

         of 1 or *"/> 
        <expression value="((kind in 'resource' | 'complex-type') and (derivation = 'specialization')) implies

         differential.element.where((min != 0 and min != 1) or (max != '1' and max != '*')).empty()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-17"/>         <requirements value="element ids need to be unique"/>         <severity value="error"/>         <human value="All element definitions must have unique ids (diff)"/>         <expression value="differential.element.all(id.exists()) and differential.element.id.trace('ids').isDistinct()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-23"/>         <requirements value="no sliceName on root"/>         <severity value="error"/>         <human value="No slice name on root"/>         <expression value="(snapshot | differential).element.all(path.contains('.').not() implies sliceName.empty())"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-11"/>         <requirements value="Ensure that the type is not inconsistent with the other information in the structure"/>         <severity value="error"/>         <human value="If there's a type, its content must match the path name in the first element of

         a snapshot"/> 
        <expression value="kind != 'logical' implies snapshot.empty() or snapshot.element.first().path = type"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-22"/>         <requirements value="no default values on data types or resources"/>         <severity value="error"/>         <human value="FHIR Specification models never have default values"/>         <expression value="url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (snapshot.element.defaultVa

        lue.empty() and differential.element.defaultValue.empty())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-14"/>         <requirements value="elements have id"/>         <severity value="error"/>         <human value="All element definitions must have an id"/>         <expression value="snapshot.element.all(id.exists()) and differential.element.all(id.exists())"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-1"/>         <severity value="error"/>         <human value="Element paths must be unique unless the structure is a constraint"/>         <expression value="derivation = 'constraint' or snapshot.element.select(path).isDistinct()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-21"/>         <requirements value="no default values on data types or resources"/>         <severity value="error"/>         <human value="Default values can only be specified on specializations"/>         <expression value="differential.element.defaultValue.exists() implies (derivation = 'specialization')"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-6"/>         <severity value="error"/>         <human value="A structure must have either a differential, or a snapshot (or both)"/>         <expression value="snapshot.exists() or differential.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-5"/>         <severity value="error"/>         <human value="If the structure defines an extension then the structure must have context information"/>         <expression value="type != 'Extension' or derivation = 'specialization' or (context.exists())"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-4"/>         <requirements value="Ensure that the base types are abstract"/>         <severity value="error"/>         <human value="If the structure is not abstract, then there SHALL be a baseDefinition"/>         <expression value="abstract = true or baseDefinition.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <mapping>         <identity value="w5"/>         <map value="conformance.content"/>       </mapping>       <mapping>         <identity value="rim"/>         <map value="n/a"/>       </mapping>     </element>     <element id="StructureDefinition.url">      <path value="StructureDefinition.url"/>       <short value="Canonical identifier for this structure definition, represented as a URI (globally

       unique)"/> 

      <definition value="An absolute URI that is used to identify this structure definition when it is referenced
       in a specification, model, design or an instance; also called its canonical identifier.
       This SHOULD be globally unique and SHOULD be a literal address at which at which an authoritative
       instance of this structure definition is (or will be) published. This URL can be the target
       of a canonical reference. It SHALL remain the same when the structure definition is stored
       on different servers.
      Can be a urn:uuid: or a urn:oid: but real http: addresses are preferred.  Multiple instances
       may share the same URL if they have a distinct version.

The determination of when to create a new version of a resource (same url, new version)
       vs. defining a new artifact is up to the author.  Considerations for making this decision
       are found in [Technical and Business Versions](resource.html#versions). 

In some cases, the resource can no longer be found at the stated url, but the url itself
       cannot change. Implementations can use the [meta.source](resource.html#meta) element to
       indicate where the current master source of the resource can be found.
      
      
      
      
      
      
      
      
        
      
      
      
      
      
        
        
      
      
        
        
      
    
    
      
      
      A formal identifier that is used to identify this structure definition when it is represented
       in other formats, or referenced in a specification, model, design or an instance.

       This SHOULD be globally unique and SHOULD be a literal address at which an authoritative
       instance of this structure definition is (or will be) published. This URL can be
       the target of a canonical reference. It SHALL remain the same when the structure
       definition is stored on different servers."/> 
      <comment value="Can be a urn:uuid: or a urn:oid: but real http: addresses are preferred.  Multiple

       instances may share the same URL if they have a distinct version.
The determination of when to create a new version of a resource (same url, new
       version) vs. defining a new artifact is up to the author.  Considerations for making
       this decision are found in [Technical and Business Versions](resource.html#versions).
       
In some cases, the resource can no longer be found at the stated url, but the url
       itself cannot change. Implementations can use the [meta.source](resource.html#meta)
       element to indicate where the current master source of the resource can be found."/> 
      <requirements value="Allows the structure definition to be referenced by a single globally unique identifier."/>       <alias value="url"/>       <alias value="authoritative-url"/>       <alias value="destination"/>       <alias value="identity"/>       <min value="1"/>       <max value="1"/>       <type>         <code value="uri"/>       </type>       <condition value="sdf-19"/>       <condition value="sdf-22"/>       <constraint>         <key value="cnl-1"/>         <severity value="warning"/>         <human value="URL should not contain | or # - these characters make processing canonical references

         problematic"/> 
        <expression value="exists() implies matches('^[^|# ]+$')"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.identifier"/>       </mapping>     </element>     <element id="StructureDefinition.identifier">      <path value="StructureDefinition.identifier"/>       <short value="Additional identifier for the structure definition"/>       <definition value="A formal identifier that is used to identify this structure definition when it

       is represented in other formats, or referenced in a specification, model, design
       or an instance."/> 

      <comment value="Typically, this is used for identifiers that can go in an HL7 V3 II (instance identifier)
       data type, and can then identify this structure definition outside of FHIR, where it is
       not possible to use the logical URI.

       data type, and can then identify this structure definition outside of FHIR, where
       it is not possible to use the logical URI."/> 

      <requirements value="Allows externally provided and/or usable business identifiers to be easily associated
       with the module.
      
      
      
        
      
      
      
      
      
        
        
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      The identifier that is used to identify this version of the structure definition when
       it is referenced in a specification, model, design or instance. This is an arbitrary value
       managed by the structure definition author and is not expected to be globally unique.
       For example, it might be a timestamp (e.g. yyyymmdd) if a managed version is not available.
       There is also no expectation that versions can be placed in a lexicographical sequence.
      There may be different structure definition instances that have the same identifier but
       different versions.  The version can be appended to the url in a reference to allow a
       reference to a particular business version of the structure definition with the format
       [url]|[version].
      
      
      
        
      
      
      
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      A natural language name identifying the structure definition. This name should be usable
       as an identifier for the module by machine processing applications such as code generation.

       with the module."/> 
      <min value="0"/>       <max value="*"/>       <type>         <code value="Identifier"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.identifier"/>       </mapping>       <mapping>         <identity value="iso11179"/>         <map value="Identifier part"/>       </mapping>       <mapping>         <identity value="objimpl"/>         <map value="no-gen-base"/>       </mapping>     </element>     <element id="StructureDefinition.version">      <path value="StructureDefinition.version"/>       <short value="Business version of the structure definition"/>       <definition value="The identifier that is used to identify this version of the structure definition

       when it is referenced in a specification, model, design or instance. This is an
       arbitrary value managed by the structure definition author and is not expected
       to be globally unique. There is no expectation that versions can be placed in a
       lexicographical sequence, so authors are encouraged to populate the StructureDefinition.versi
      onAlgorithm[x] element to enable comparisons. If there is no managed version available,
       authors can consider using ISO date/time syntax (e.g., '2023-01-01')."/> 
      <comment value="There may be different structure definition instances that have the same identifier

       but different versions.  The version can be appended to the url in a reference
       to allow a reference to a particular business version of the structure definition
       with the format [url]|[version]. The version SHOULD NOT contain a '#' - see [Business
       Version](resource.html#bv-format)."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="string"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.version"/>       </mapping>       <mapping>         <identity value="iso11179"/>         <map value="Version"/>       </mapping>     </element>     <element id="StructureDefinition.versionAlgorithm[x]">      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">        <valueCode value="trial-use"/>       </extension>       <path value="StructureDefinition.versionAlgorithm[x]"/>       <short value="How to compare versions"/>       <definition value="Indicates the mechanism used to compare versions to determine which is more current."/>       <comment value="If set as a string, this is a FHIRPath expression that has two additional context

       variables passed in - %version1 and %version2 and will return a negative number
       if version1 is newer, a positive number if version2 and a 0 if the version ordering
       can't be successfully be determined."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="string"/>       </type>       <type>         <code value="Coding"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <strength value="extensible"/>         <valueSet value="http://hl7.org/fhir/ValueSet/version-algorithm"/>       </binding>     </element>     <element id="StructureDefinition.name">      <path value="StructureDefinition.name"/>       <short value="Name for this structure definition (computer friendly)"/>       <definition value="A natural language name identifying the structure definition. This name should

       be usable as an identifier for the module by machine processing applications such
       as code generation."/> 

      <comment value="The name is not expected to be globally unique. The name should be a simple alphanumeric
       type name to ensure that it is machine-processing friendly.Some Examples: 

* O2SatObservation
* PresentationReport
* Immunization2
* AcmeAdmissionRecordOld.
      
      
      
      
        
      
      
      
      
    
    
      
      
      

       type name to ensure that it is machine-processing friendly.Some Examples: 
* O2SatObservation
* PresentationReport
* Immunization2
* AcmeAdmissionRecordOld."/> 
      <requirements value="Support human navigation and code generation."/>       <min value="1"/>       <max value="1"/>       <type>         <code value="string"/>       </type>       <condition value="cnl-0"/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.title">      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <path value="StructureDefinition.title"/>       <short value="Name for this structure definition (human friendly)"/>       <definition value="A short, descriptive, user-friendly title for the structure definition."/> 
      <comment value="This name does not need to be machine-processing friendly and may contain punctuation,
       white-space, etc.Applications don't have to use this name but can always fall back to
       it. The title also corresponds to the label for the root element.
      
      
      
        
      
      
      
      
      
        
        
      
    
    
      
      
      
      
      
      
      
        
      
      
      
      This is labeled as &quot;Is Modifier&quot; because applications should not use a retired
       {{title}} without due consideration
      
      
        
          
        
        
          
        
        
        
        
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      A Boolean value to indicate that this structure definition is authored for testing purposes
       (or education/evaluation/marketing) and is not intended to be used for genuine usage.
      
      Enables experimental content to be developed following the same lifecycle that would be
       used for a production-level structure definition.
      
      
      
        
      
      
      
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      The date  (and optionally time) when the structure definition was published. The date
       must change when the business version changes and it must change if the status code changes.
       In addition, it should change when the substantive content of the structure definition
       changes.
      Note that this is not the same as the resource last-modified-date, since the resource
       may be a secondary representation of the structure definition. Additional specific dates
       may be added as extensions or be found by consulting Provenances associated with past
       versions of the resource.
      
      
      
      
        
      
      
      
      
      
        
        
      
      
        
        
      
    
    
      
      
      
      Usually an organization but may be an individual. The publisher (or steward) of the structure
       definition is the organization or individual primarily responsible for the maintenance
       and upkeep of the structure definition. This is not necessarily the same individual or
       organization that developed and initially authored the content. The publisher is the primary
       point of contact for questions or issues with the structure definition. This item SHOULD
       be populated unless the information is available from context.
      Helps establish the &quot;authority/credibility&quot; of the structure definition.  May
       also allow for contact.
      
      
      
        
      
      
      
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      
      
      
      
      
        
      
      
      
      
      
        
        
      
    
    
      
      

       white-space, etc.Applications don't have to use this name but can always fall back
       to it. The title also corresponds to the label for the root element."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="string"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.status">      <path value="StructureDefinition.status"/>       <short value="draft | active | retired | unknown"/>       <definition value="The status of this structure definition. Enables tracking the life-cycle of the

       content."/> 
      <comment value="Allows filtering of structure definitions that are appropriate for use versus not.
See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <min value="1"/>       <max value="1"/>       <type>         <code value="code"/>       </type>       <mustSupport value="false"/>       <isModifier value="true"/>       <isModifierReason value="This is labeled as &quot;Is Modifier&quot; because applications should not use

       a retired {{title}} without due consideration"/> 
      <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="PublicationStatus"/>         </extension>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-isCommonBinding">          <valueBoolean value="true"/>         </extension>         <strength value="required"/>         <description value="The lifecycle status of an artifact."/>         <valueSet value="http://hl7.org/fhir/ValueSet/publication-status|5.0.0"/>       </binding>       <mapping>         <identity value="w5"/>         <map value="FiveWs.status"/>       </mapping>       <mapping>         <identity value="iso11179"/>         <map value="Registration status"/>       </mapping>     </element>     <element id="StructureDefinition.experimental">      <path value="StructureDefinition.experimental"/>       <short value="For testing purposes, not real usage"/>       <definition value="A Boolean value to indicate that this structure definition is authored for testing

       purposes (or education/evaluation/marketing) and is not intended to be used for
       genuine usage."/> 
      <comment value="Allows filtering of structure definitions that are appropriate for use versus not."/>       <requirements value="Enables experimental content to be developed following the same lifecycle that

       would be used for a production-level structure definition."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="boolean"/>       </type>       <meaningWhenMissing value="If absent, this resource is treated as though it is not experimental."/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.class"/>       </mapping>       <mapping>         <identity value="iso11179"/>         <map value="Registration status"/>       </mapping>     </element>     <element id="StructureDefinition.date">      <path value="StructureDefinition.date"/>       <short value="Date last changed"/>       <definition value="The date  (and optionally time) when the structure definition was last significantly

       changed. The date must change when the business version changes and it must change
       if the status code changes. In addition, it should change when the substantive
       content of the structure definition changes."/> 
      <comment value="The date is often not tracked until the resource is published, but may be present

       on draft content. Note that this is not the same as the resource last-modified-date,
       since the resource may be a secondary representation of the structure definition.
       Additional specific dates may be added as extensions or be found by consulting
       Provenances associated with past versions of the resource.
See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <alias value="Revision Date"/>       <min value="0"/>       <max value="1"/>       <type>         <code value="dateTime"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.recorded"/>       </mapping>     </element>     <element id="StructureDefinition.publisher">      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <path value="StructureDefinition.publisher"/>       <short value="Name of the publisher/steward (organization or individual)"/>       <definition value="The name of the organization or individual responsible for the release and ongoing

       maintenance of the structure definition."/> 
      <comment value="Usually an organization but may be an individual. The publisher (or steward) of

       the structure definition is the organization or individual primarily responsible
       for the maintenance and upkeep of the structure definition. This is not necessarily
       the same individual or organization that developed and initially authored the content.
       The publisher is the primary point of contact for questions or issues with the
       structure definition. This item SHOULD be populated unless the information is available
       from context."/> 
      <requirements value="Helps establish the &quot;authority/credibility&quot; of the structure definition.

        May also allow for contact."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="string"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.witness"/>       </mapping>       <mapping>         <identity value="iso11179"/>         <map value="Registration Authority"/>       </mapping>     </element>     <element id="StructureDefinition.contact">      <path value="StructureDefinition.contact"/>       <short value="Contact details for the publisher"/>       <definition value="Contact details to assist a user in finding and communicating with the publisher."/>       <comment value="May be a web site, an email address, a telephone number, etc.
See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <min value="0"/>       <max value="*"/>       <type>         <code value="ContactDetail"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.description">      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <path value="StructureDefinition.description"/>       <short value="Natural language description of the structure definition"/> 
      <definition value="A free text natural language description of the structure definition from a consumer's
       perspective.
      This description can be used to capture details such as why the structure definition was
       built, comments about misuse, instructions for clinical use and interpretation, literature
       references, examples from the paper world, etc. It is not a rendering of the structure
       definition as conveyed in the 'text' field of the resource itself. This item SHOULD be
       populated unless the information is available from context (e.g. the language of the structure
       definition is presumed to be the predominant language in the place the structure definition
       was created).
      
      
      
        
      
      
      
      
      
        
        
      
    
    
      
        
      
      
      
      The content was developed with a focus and intent of supporting the contexts that are
       listed. These contexts may be general categories (gender, age, ...) or may be references
       to specific programs (insurance plans, studies, ...) and may be used to assist with indexing
       and searching for appropriate structure definition instances.
      When multiple useContexts are specified, there is no expectation that all or any of the
       contexts apply.
      
      
      
      
        
      
      
      
      
      
        
        
      
    
    
      
      
      
      It may be possible for the structure definition to be used in jurisdictions other than
       those for which it was originally designed or intended.
      
      
      
        
      
      
      
      
      
        
          
        
        
          
        
        
        
        
      
      
        
        
      
    
    
      
      
      Explanation of why this structure definition is needed and why it has been designed as
       it has.
      This element does not describe the usage of the structure definition. Instead, it provides
       traceability of ''why'' the resource is either needed or ''why'' it is defined as it is.
        This may be used to point to source materials or specifications that drove the structure
       of this structure definition.
      
      
      
        
      
      
      
      
      
        
        
      
      
        
        
      
      
        
        
      
    
    
      
      
      A copyright statement relating to the structure definition and/or its contents. Copyright
       statements are generally legal restrictions on the use and publishing of the structure
       definition.

       perspective."/> 
      <comment value="This description can be used to capture details such as comments about misuse,

       instructions for clinical use and interpretation, literature references, examples
       from the paper world, etc. It is not a rendering of the structure definition as
       conveyed in the 'text' field of the resource itself. This item SHOULD be populated
       unless the information is available from context (e.g. the language of the structure
       definition is presumed to be the predominant language in the place the structure
       definition was created)."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="markdown"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.useContext">      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">        <valueCode value="trial-use"/>       </extension>       <path value="StructureDefinition.useContext"/>       <short value="The context that the content is intended to support"/>       <definition value="The content was developed with a focus and intent of supporting the contexts that

       are listed. These contexts may be general categories (gender, age, ...) or may
       be references to specific programs (insurance plans, studies, ...) and may be used
       to assist with indexing and searching for appropriate structure definition instances."/> 
      <comment value="When multiple useContexts are specified, there is no expectation that all or any

       of the contexts apply."/> 
      <requirements value="Assist in searching for appropriate content."/>       <min value="0"/>       <max value="*"/>       <type>         <code value="UsageContext"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.jurisdiction">      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">        <valueCode value="deprecated"/>       </extension>       <path value="StructureDefinition.jurisdiction"/>       <short value="Intended jurisdiction for structure definition (if applicable)"/>       <definition value="A legal or geographic region in which the structure definition is intended to be

       used."/> 
      <comment value="It may be possible for the structure definition to be used in jurisdictions other

       than those for which it was originally designed or intended.
DEPRECATION NOTE: For consistency, implementations are encouraged to migrate to
       using the new 'jurisdiction' code in the useContext element.  (I.e. useContext.code
       indicating http://terminology.hl7.org/CodeSystem/usage-context-type#jurisdiction
       and useContext.valueCodeableConcept indicating the jurisdiction.)"/> 
      <min value="0"/>       <max value="*"/>       <type>         <code value="CodeableConcept"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="Jurisdiction"/>         </extension>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-isCommonBinding">          <valueBoolean value="true"/>         </extension>         <strength value="extensible"/>         <description value="Countries and regions within which this artifact is targeted for use."/>         <valueSet value="http://hl7.org/fhir/ValueSet/jurisdiction"/>       </binding>     </element>     <element id="StructureDefinition.purpose">      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <path value="StructureDefinition.purpose"/>       <short value="Why this structure definition is defined"/>       <definition value="Explanation of why this structure definition is needed and why it has been designed

       as it has."/> 
      <comment value="This element does not describe the usage of the structure definition. Instead,

       it provides traceability of ''why'' the resource is either needed or ''why'' it
       is defined as it is.  This may be used to point to source materials or specifications
       that drove the structure of this structure definition."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="markdown"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="w5"/>         <map value="FiveWs.why[x]"/>       </mapping>       <mapping>         <identity value="objimpl"/>         <map value="no-gen-base"/>       </mapping>     </element>     <element id="StructureDefinition.copyright">      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <path value="StructureDefinition.copyright"/>       <short value="Use and/or publishing restrictions"/>       <definition value="A copyright statement relating to the structure definition and/or its contents.

       Copyright statements are generally legal restrictions on the use and publishing
       of the structure definition.  The short copyright declaration (e.g. (c) '2015+
       xyz organization' should be sent in the copyrightLabel element."/> 
      <comment value="..."/> 
      <requirements value="Consumers must be able to determine any legal restrictions on the use of the structure
       definition and/or its content.
      
      
      
      
      
        
      
      
      
      
      
        
        
      
      
        
        
      
    
    
      
      
      A set of key words or terms from external terminologies that may be used to assist with
       indexing and searching of templates nby describing the use of this structure definition,
       or the content it describes.
      
      
      
      
        
      
      
      
      
      
        
          
        
        
        
        
      
      
        
        
      
    
    
      
      
      The version of the FHIR specification on which this StructureDefinition is based - this
       is the formal version of the specification, without the revision number, e.g. [publication].[major].
      [minor], which is 4.3.0 for this version.
      A StructureDefinition does not need to specify the target it applies to as StructureDefinitions
       will often be valid across multiple versions of FHIR. FHIR tooling can determine whether
       a StructureDefinition is consistent with a particular StructureDefinition if desired.
      
      
      
        
      
      
      
      
      
        
          
        
        
          
        
        
        
        
      
    
    
      
      
      
      
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      

       definition and/or its content."/> 
      <alias value="License"/>       <alias value="Restrictions"/>       <min value="0"/>       <max value="1"/>       <type>         <code value="markdown"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="objimpl"/>         <map value="no-gen-base"/>       </mapping>     </element>     <element id="StructureDefinition.copyrightLabel">      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">        <valueCode value="trial-use"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">        <valueBoolean value="true"/>       </extension>       <path value="StructureDefinition.copyrightLabel"/>       <short value="Copyright holder and year(s)"/>       <definition value="A short string (&lt;50 characters), suitable for inclusion in a page footer that

       identifies the copyright holder, effective period, and optionally whether rights
       are resctricted. (e.g. 'All rights reserved', 'Some rights reserved')."/> 
      <comment value="The (c) symbol should NOT be included in this string. It will be added by software

       when rendering the notation. Full details about licensing, restrictions, warrantees,
       etc. goes in the more general 'copyright' element."/> 
      <requirements value="Defines the content expected to be rendered in all representations of the artifact."/>       <min value="0"/>       <max value="1"/>       <type>         <code value="string"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.keyword">      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">        <valueCode value="deprecated"/>       </extension>       <path value="StructureDefinition.keyword"/>       <short value="Assist with indexing and finding"/>       <definition value="(DEPRECATED) A set of key words or terms from external terminologies that may be

       used to assist with indexing and searching of templates nby describing the use
       of this structure definition, or the content it describes."/> 
      <comment value="Note that this element is deprecated. Use the [http://hl7.org/fhir/StructureDefinition/artifa

      ct-topic](http://hl7.org/fhir/extensions/StructureDefinition-artifact-topic.html)
       extension instead."/> 
      <requirements value="Assist in searching for appropriate StructureDefinitions."/>       <min value="0"/>       <max value="*"/>       <type>         <code value="Coding"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="StructureDefinitionKeyword"/>         </extension>         <strength value="extensible"/>         <description value="Codes for the meaning of the defined structure (SNOMED CT and LOINC codes, as an

         example)."/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/definition-use"/>       </binding>       <mapping>         <identity value="iso11179"/>         <map value="keywords"/>       </mapping>     </element>     <element id="StructureDefinition.fhirVersion">      <path value="StructureDefinition.fhirVersion"/>       <short value="FHIR Version this StructureDefinition targets"/>       <definition value="The version of the FHIR specification on which this StructureDefinition is based

       - this is the formal version of the specification, without the revision number,
       e.g. [publication].[major].[minor], which is 4.6.0. for this version."/> 
      <comment value="A StructureDefinition does not need to specify the target it applies to as StructureDefinitio

      ns will often be valid across multiple versions of FHIR. FHIR tooling can determine
       whether a StructureDefinition is consistent with a particular StructureDefinition
       if desired."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="code"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="FHIRVersion"/>         </extension>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-isCommonBinding">          <valueBoolean value="true"/>         </extension>         <strength value="required"/>         <description value="All published FHIR Versions."/>         <valueSet value="http://hl7.org/fhir/ValueSet/FHIR-version|5.0.0"/>       </binding>     </element>     <element id="StructureDefinition.mapping">      <path value="StructureDefinition.mapping"/>       <short value="External specification that the content is mapped to"/>       <definition value="An external specification that the content is mapped to."/>       <min value="0"/>       <max value="*"/>       <type>         <code value="BackboneElement"/>       </type>       <constraint>         <key value="sdf-2"/>         <severity value="error"/>         <human value="Must have at least a name or a uri (or both)"/>         <expression value="name.exists() or uri.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.mapping.identity">      <path value="StructureDefinition.mapping.identity"/>       <short value="Internal id when this mapping is used"/>       <definition value="An Internal id that is used to identify this mapping set when specific mappings

       are made."/> 

      <comment value="The specification is described once, with general comments, and then specific mappings
       are made that reference this declaration.
      
      
      
        
      
      
      
      
    
    
      
      
      
      
      
      
      
        
      
      
      
      
      
    
    
      
      
      
      
      
      
        
      
      
      
      
      
    
    
      
      
      Comments about this mapping, including version notes, issues, scope limitations, and other
       important notes for usage.
      
      
      
        
      
      
      
      
    
    
      
      
      
      
      
      
        
      
      
      
      
      
        
          
        
        
        
        
      
    
    
      
      
      Whether structure this definition describes is abstract or not  - that is, whether the
       structure is not intended to be instantiated. For Resources and Data types, abstract types
       will never be exchanged  between systems.

       are made that reference this declaration."/> 
      <min value="1"/>       <max value="1"/>       <type>         <code value="id"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.mapping.uri">      <path value="StructureDefinition.mapping.uri"/>       <short value="Identifies what this mapping refers to"/>       <definition value="An absolute URI that identifies the specification that this mapping is expressed

       to."/> 
      <comment value="A formal identity for the specification being mapped to helps with identifying

       maps consistently."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="uri"/>       </type>       <condition value="sdf-2"/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.mapping.name">      <path value="StructureDefinition.mapping.name"/>       <short value="Names what this mapping refers to"/>       <definition value="A name for the specification that is being mapped to."/>       <min value="0"/>       <max value="1"/>       <type>         <code value="string"/>       </type>       <condition value="sdf-2"/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.mapping.comment">      <path value="StructureDefinition.mapping.comment"/>       <short value="Versions, Issues, Scope limitations etc"/>       <definition value="Comments about this mapping, including version notes, issues, scope limitations,

       and other important notes for usage."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="string"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.kind">      <path value="StructureDefinition.kind"/>       <short value="primitive-type | complex-type | resource | logical"/>       <definition value="Defines the kind of structure that this definition is describing."/>       <min value="1"/>       <max value="1"/>       <type>         <code value="code"/>       </type>       <condition value="sdf-15a"/>       <condition value="sdf-15"/>       <condition value="sdf-11"/>       <condition value="sdf-29"/>       <condition value="sdf-8"/>       <condition value="sdf-3"/>       <condition value="sdf-8a"/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="StructureDefinitionKind"/>         </extension>         <strength value="required"/>         <description value="Defines the type of structure that a definition is describing."/>         <valueSet value="http://hl7.org/fhir/ValueSet/structure-definition-kind|5.0.0"/>       </binding>     </element>     <element id="StructureDefinition.abstract">      <path value="StructureDefinition.abstract"/>       <short value="Whether the structure is abstract"/>       <definition value="Whether structure this definition describes is abstract or not  - that is, whether

       the structure is not intended to be instantiated. For Resources and Data types,
       abstract types will never be exchanged  between systems."/> 

      <comment value="Abstract Resources cannot be instantiated - a concrete sub-type must be used. Abstract
       datatypes and extensions cannot be used in an instance. For logical models, the exact
       implication of &quot;abstract&quot; will rest with the author, depending how the logical
       model is used. Flagging a constraint structure as abstract conveys design intent but makes
       no difference to how the structure definition is handled. Note that inline declared elements
       that are given the type &quot;Element&quot; in the StructureDefinition, but have children
       described, are anonymous concrete types that specialize Element.
      
      
      
        
      
      
      
      
    
    
      
      
      
      
      
      
        
      
      
      
      
      
    
    
      
      

       datatypes and extensions cannot be used in an instance. For logical models, the
       exact implication of &quot;abstract&quot; will rest with the author, depending
       how the logical model is used. Flagging a constraint structure as abstract conveys
       design intent but makes no difference to how the structure definition is handled.
       Note that inline declared elements that are given the type &quot;Element&quot;
       in the StructureDefinition, but have children described, are anonymous concrete
       types that specialize Element."/> 
      <min value="1"/>       <max value="1"/>       <type>         <code value="boolean"/>       </type>       <condition value="sdf-4"/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.context">      <path value="StructureDefinition.context"/>       <short value="If an extension, where it can be used in instances"/>       <definition value="Identifies the types of resource or data type elements to which the extension can

       be applied. For more guidance on using the 'context' element, see the [defining
       extensions page](defining-extensions.html#context)."/> 
      <min value="0"/>       <max value="*"/>       <type>         <code value="BackboneElement"/>       </type>       <condition value="sdf-5"/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.context.type">      <path value="StructureDefinition.context.type"/>       <short value="fhirpath | element | extension"/> 
      <definition value="Defines how to interpret the expression that defines what the context of the extension
       is.
      
      
      
        
      
      
      
      
      
        
          
        
        
        
        
      
    
    
      
      
      
      
      
      
        
      
      
      
      
    
    
      
      
      A set of rules as FHIRPath Invariants about when the extension can be used (e.g. co-occurrence
       variants for the extension). All the rules must be true.
      The rules are only evaluated when the extension is present. When evaluating the invariant,
       the FHIRPath focus is the element that holds the extension, and %extension refers to the
       extension itself.
      
      
      
        
      
      
      
      
      
    
    
      
      
      The type this structure describes. If the derivation kind is 'specialization' then this
       is the master definition for a type, and there is always one of these (a data type, an
       extension, a resource, including abstract ones). Otherwise the structure definition is
       a constraint on the stated type (and in this case, the type cannot be an abstract type).
        References are URLs that are relative to http://hl7.org/fhir/StructureDefinition e.g.
       &quot;string&quot; is a reference to http://hl7.org/fhir/StructureDefinition/string. Absolute
       URLs are only allowed in logical models.

       is."/> 
      <min value="1"/>       <max value="1"/>       <type>         <code value="code"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="ExtensionContextType"/>         </extension>         <strength value="required"/>         <description value="How an extension context is interpreted."/>         <valueSet value="http://hl7.org/fhir/ValueSet/extension-context-type|5.0.0"/>       </binding>     </element>     <element id="StructureDefinition.context.expression">      <path value="StructureDefinition.context.expression"/>       <short value="Where the extension can be used in instances"/>       <definition value="An expression that defines where an extension can be used in resources."/>       <min value="1"/>       <max value="1"/>       <type>         <code value="string"/>       </type>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.contextInvariant">      <path value="StructureDefinition.contextInvariant"/>       <short value="FHIRPath invariants - when the extension can be used"/>       <definition value="A set of rules as FHIRPath Invariants about when the extension can be used (e.g.

       co-occurrence variants for the extension). All the rules must be true."/> 
      <comment value="The rules are only evaluated when the extension is present. When evaluating the

       invariant, the FHIRPath focus is the element that holds the extension, and %extension
       refers to the extension itself."/> 
      <min value="0"/>       <max value="*"/>       <type>         <code value="string"/>       </type>       <condition value="sdf-18"/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.type">      <path value="StructureDefinition.type"/>       <short value="Type defined or constrained by this structure"/>       <definition value="The type this structure describes. If the derivation kind is 'specialization' then

       this is the master definition for a type, and there is always one of these (a data
       type, an extension, a resource, including abstract ones). Otherwise the structure
       definition is a constraint on the stated type (and in this case, the type cannot
       be an abstract type).  References are URLs that are relative to http://hl7.org/fhir/Structure
      Definition e.g. &quot;string&quot; is a reference to http://hl7.org/fhir/StructureDefinition/s
      tring. Absolute URLs are only allowed in logical models, where they are required."/> 

      <comment value="Note that in the case of constraints, the type could be determined by chasing through
       the baseDefinition references until a concrete structure (derivation = specialization)
       is reached, or by looking at the path of the first element in the snapshot - if present
       - but providing the type directly makes for simpler tooling and indexing. 

The type must match the elements defined in the differential and the snapshot. For all
       FHIR defined types, the path name of the element will start with the type name. For logical
       models, where the type is a URL, the type name SHOULD start with the tail of the type
       URL where required.
      
      
      
        
      
      
      
      
      
      
        
          
        
        
          
        
        
        
        
      
    
    
      
      
      An absolute URI that is the base structure from which this type is derived, either by
       specialization or constraint.
      If differential constraints are specified in this structure, they are applied to the base
       in a &quot;differential&quot; fashion. If there is no base, then the differential constraints
       cannot be provided (snapshot only). Differential structures are useful for the editing
       perspective, and snapshot structures are suitable for operational use. The FHIR Project
       provides a number of tools/services to populate snapshots from differential constraints.
       Logical Models have a base of &quot;Element&quot; or another logical model.
      
      
      
        
          
        
        
        
      
      
      
      
      
    
    
      
      
      
      If the definition is a specialization, then it adds new elements in the differential,
       and the snapshot includes the inherited elements.  If the definition is a constraint,

       the baseDefinition references until a type defining structure (derivation = specialization)
       is reached, or by looking at the path of the first element in the snapshot - if
       present - but providing the type directly makes for simpler tooling and indexing.
       
The type must match the elements defined in the differential and the snapshot.
       For all FHIR defined types, the path name of the element will start with the type
       name. For logical models, where the type SHALL be a fully specified URL, the type
       name SHOULD start with the final path segment of the type URL where required. E.g.
       If the type was &quot;http://example.org/fhir/MyLogicalModelType&quot;, the type
       name should start with 'MyLogicalModelType'."/> 
      <min value="1"/>       <max value="1"/>       <type>         <code value="uri"/>       </type>       <condition value="sdf-18"/>       <condition value="sdf-11"/>       <condition value="sdf-5"/>       <condition value="sdf-8"/>       <condition value="sdf-8a"/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="FHIRTypes"/>         </extension>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-isCommonBinding">          <valueBoolean value="true"/>         </extension>         <strength value="extensible"/>         <description value="Either a resource or a data type, including logical model types."/>         <valueSet value="http://hl7.org/fhir/ValueSet/fhir-types"/>       </binding>     </element>     <element id="StructureDefinition.baseDefinition">      <path value="StructureDefinition.baseDefinition"/>       <short value="Definition that this type is constrained/specialized from"/>       <definition value="An absolute URI that is the base structure from which this type is derived, either

       by specialization or constraint."/> 
      <comment value="If differential constraints are specified in this structure, they are applied to

       the base in a &quot;differential&quot; fashion. If there is no base, then the differential
       constraints cannot be provided (snapshot only). Differential structures are useful
       for the editing perspective, and snapshot structures are suitable for operational
       use. The FHIR Project provides a number of tools/services to populate snapshots
       from differential constraints. Logical Models have a base of &quot;Base&quot;,
       &quot;Element&quot; or another logical model."/> 
      <min value="0"/>       <max value="1"/>       <type>         <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy">          <valueBoolean value="true"/>         </extension>         <code value="canonical"/>         <targetProfile value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </type>       <condition value="sdf-4"/>       <condition value="sdf-27"/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>     </element>     <element id="StructureDefinition.derivation">      <path value="StructureDefinition.derivation"/>       <short value="specialization | constraint - How relates to base definition"/>       <definition value="How the type relates to the baseDefinition."/>       <comment value="If the definition is a specialization, then it adds to the differential new elements

       and optionally additional rules to an existing concrete type, and the snapshot
       includes the inherited elements and rules.  If the definition is a constraint,

       then it cannot define new elements, it can only make new rules about existing content
       (see [Profiling Resources](profiling.html#resources)).
      
      
      
        
      
      
      
      
      
        
          
        
        
        
        
      
    
    
      
      
      A snapshot view is expressed in a standalone form that can be used and interpreted without
       considering the base StructureDefinition.
      
      
      
        
      
      
      
        
        
        All snapshot elements must start with the StructureDefinition's specified type for non-logical
         models, or with the same type name for logical models
        (%resource.kind = 'logical' or element.first().path = %resource.type) and element.tail().all(path.st
        artsWith(%resource.snapshot.element.first().path&amp;'.'))
        f:element[1]/f:path/@value=parent::f:StructureDefinition/f:type/@value and count(f:element[position(
        )!=1])=count(f:element[position()!=1][starts-with(f:path/@value, concat(ancestor::f:StructureDefiniti
        on/f:type/@value, '.'))])
        
      
      
        
        
        For CodeableReference elements, bindings must be listed on the CodeableReference, not
         the CodeableReference.concept
        element.where(type.code='CodeableConcept' and id.endsWith('.concept') and binding.exists()
         and id.substring(0,$this.length()-8) in %context.element.where(type.code='CodeableReference').id).ex
        ists().not()
        not(exists(for $cr in f:element[f:type/f:code/@value='CodeableReference'] return $cr/following-sibli
        ng::f:element[@id=concat($cr/@id, '.concept') and f:type/f:code/@value='CodeableConcept'
         and exists(f:binding)]))
        
      
      
        
        

       (see [Profiling Resources](profiling.html#resources))."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="code"/>       </type>       <condition value="sdf-1"/>       <condition value="sdf-21"/>       <condition value="sdf-5"/>       <condition value="sdf-27"/>       <condition value="sdf-29"/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="true"/>       <binding>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">          <valueString value="TypeDerivationRule"/>         </extension>         <strength value="required"/>         <description value="How a type relates to its baseDefinition."/>         <valueSet value="http://hl7.org/fhir/ValueSet/type-derivation-rule|5.0.0"/>       </binding>     </element>     <element id="StructureDefinition.snapshot">      <path value="StructureDefinition.snapshot"/>       <short value="Snapshot view of the structure"/>       <definition value="A snapshot view is expressed in a standalone form that can be used and interpreted

       without considering the base StructureDefinition."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="BackboneElement"/>       </type>       <condition value="sdf-11"/>       <condition value="sdf-1"/>       <condition value="sdf-6"/>       <constraint>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice">          <valueBoolean value="true"/>         </extension>         <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice-explanation">          <valueMarkdown value="It is bad practice to set the root element of a profile to 'mustSupport' as mustSupport

           should always be determined by the element referencing a type.  The designer of
           a StructureDefinition cannot know all circumstances in which a type or profile
           might be used"/> 
        </extension>         <key value="sdf-26"/>         <severity value="warning"/>         <human value="The root element of a profile should not have mustSupport = true"/>         <expression value="$this.where(element[0].mustSupport='true').exists().not()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-8"/>         <severity value="error"/>         <human value="All snapshot elements must start with the StructureDefinition's specified type

         for non-logical models, or with the same type name for logical models"/> 
        <expression value="(%resource.kind = 'logical' or element.first().path = %resource.type) and element.tail().all(

        path.startsWith(%resource.snapshot.element.first().path&amp;'.'))"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-25"/>         <severity value="error"/>         <human value="For CodeableReference elements, bindings must be listed on the CodeableReference,

         not the CodeableReference.concept"/> 
        <expression value="element.where(type.where(code='CodeableConcept').exists() and path.endsWith('.concept')

         and binding.exists() and (path.substring(0,$this.path.length()-8) in %context.element.where(t
        ype.where(code='CodeableReference').exists()).path)).exists().not()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-24"/>         <severity value="error"/> 
        <human value="For CodeableReference elements, target profiles must be listed on the CodeableReference,
         not the CodeableReference.reference
        element.where(type.code='Reference' and id.endsWith('.reference') and type.targetProfile.exists()
         and id.substring(0,$this.length()-10) in %context.element.where(type.code='CodeableReference').id).e
        xists().not()
        not(exists(for $cr in f:element[f:type/f:code/@value='CodeableReference'] return $cr/following-sibli
        ng::f:element[@id=concat($cr/@id, '.reference') and f:type/f:code/@value='Reference' and
         exists(f:type/f:targetProfile)]))
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      
      
    
    
      
      
      
      
      
      
        
      
      
      
        
        
        
        
        
        
        
      
      
      
      
      
        
        
      
    
    
      
      

         not the CodeableReference.reference"/> 
        <expression value="element.where(type.where(code='Reference').exists() and path.endsWith('.reference')

         and type.targetProfile.exists() and (path.substring(0,$this.path.length()-10) in
         %context.element.where(type.where(code='CodeableReference').exists()).path)).exists().not()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-3"/>         <severity value="error"/>         <human value="Each element definition in a snapshot must have a formal definition and cardinalities,

         unless model is a logical model"/> 
        <expression value="%resource.kind = 'logical' or element.all(definition.exists() and min.exists()

         and max.exists())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-8b"/>         <severity value="error"/>         <human value="All snapshot elements must have a base definition"/>         <expression value="element.all(base.exists())"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.snapshot.element">      <path value="StructureDefinition.snapshot.element"/>       <short value="Definition of elements in the resource (if no StructureDefinition)"/>       <definition value="Captures constraints on each element within the resource."/>       <min value="1"/>       <max value="*"/>       <type>         <code value="ElementDefinition"/>       </type>       <condition value="sdf-9"/>       <condition value="sdf-19"/>       <condition value="sdf-16"/>       <condition value="sdf-15"/>       <condition value="sdf-23"/>       <condition value="sdf-11"/>       <condition value="sdf-22"/>       <condition value="sdf-14"/>       <condition value="sdf-1"/>       <condition value="sdf-8"/>       <condition value="sdf-3"/>       <condition value="sdf-8b"/>       <condition value="sdf-24"/>       <condition value="sdf-25"/>       <condition value="sdf-26"/>       <constraint>         <key value="sdf-28"/>         <severity value="error"/>         <human value="If there are no discriminators, there must be a definition"/>         <expression value="slicing.exists().not() or (slicing.discriminator.exists() or slicing.description.exists())"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-10"/>         <requirements value="binding is required"/>         <severity value="error"/>         <human value="provide either a binding reference or a description (or both)"/>         <expression value="binding.empty() or binding.valueSet.exists() or binding.description.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="iso11179"/>         <map value="--"/>       </mapping>     </element>     <element id="StructureDefinition.differential">      <path value="StructureDefinition.differential"/>       <short value="Differential view of the structure"/> 
      <definition value="A differential view is expressed relative to the base StructureDefinition - a statement
       of differences that it applies.
      
      
      
        
      
      
      
        
        
        
        
        
        
        
      
      
        
        
        In any differential, all the elements must start with the StructureDefinition's specified
         type for non-logical models, or with the same type name for logical models
        (%resource.kind = 'logical' or element.first().path.startsWith(%resource.type)) and (element.tail().
        empty() or element.tail().all(path.startsWith(%resource.differential.element.first().path.replaceMatc
        hes('\\..*','')&amp;'.')))
        count(f:element)=count(f:element[f:path/@value=ancestor::f:StructureDefinition/f:type/@value
         or starts-with(f:path/@value, concat(ancestor::f:StructureDefinition/f:type/@value, '.'))])
        
      
      
      
      
    
    
      
      
      
      
      
      
        
      
      
      
      
      
        
        
      
    
  

       of differences that it applies."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="BackboneElement"/>       </type>       <condition value="sdf-6"/>       <constraint>         <key value="sdf-20"/>         <requirements value="no slicing on root"/>         <severity value="error"/>         <human value="No slicing on the root element"/>         <expression value="element.where(path.contains('.').not()).slicing.empty()"/>         <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <constraint>         <key value="sdf-8a"/>         <severity value="error"/>         <human value="In any differential, all the elements must start with the StructureDefinition's

         specified type for non-logical models, or with the same type name for logical models"/> 
        <expression value="(%resource.kind = 'logical' or element.first().path.startsWith(%resource.type))

         and (element.tail().empty() or  element.tail().all(path.startsWith(%resource.differential.ele
        ment.first().path.replaceMatches('\\..*','')&amp;'.')))"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/StructureDefinition"/>       </constraint>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>     </element>     <element id="StructureDefinition.differential.element">      <path value="StructureDefinition.differential.element"/>       <short value="Definition of elements in the resource (if no StructureDefinition)"/>       <definition value="Captures constraints on each element within the resource."/>       <min value="1"/>       <max value="*"/>       <type>         <code value="ElementDefinition"/>       </type>       <condition value="sdf-9"/>       <condition value="sdf-15a"/>       <condition value="sdf-19"/>       <condition value="sdf-17"/>       <condition value="sdf-23"/>       <condition value="sdf-22"/>       <condition value="sdf-14"/>       <condition value="sdf-21"/>       <condition value="sdf-29"/>       <condition value="sdf-20"/>       <condition value="sdf-8a"/>       <mustSupport value="false"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="iso11179"/>         <map value="--"/>       </mapping>     </element>   </differential> 


</

StructureDefinition

>



Usage note: every effort has been made to ensure that the examples are correct and useful, but they are not a normative part of the specification.