StructureDefinition: ComputableValueSet - XML

ComputableValueSet

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


<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="computablevalueset"/> 
  <text> 
    <status value="generated"/> 
    <div xmlns="http://www.w3.org/1999/xhtml">to do</div> 
  </text> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-summary">
    <valueMarkdown value="**mustSupport**
When this profile has defined an element as mustSupport, the sender must provide
     the element value when available, and the receiver must accept the element value,
     persist the value and when appropriate, provide function as defined in the profile.
     When mustSupport is defined at a complex element level, all sub-elements inherit

When this profile has defined an element as mustSupport, the sender must provide
     the element value when available, and the receiver must accept the element value,
     persist the value and when appropriate, provide function as defined in the profile.
     When mustSupport is defined at a complex element level, all sub-elements inherit

     mustSupport."/> 
  </extension> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="3"/> 
  </extension> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="vocab"/> 
  </extension> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="trial-use"/> 
  </extension> 
  <extension url="http://hl7.org/fhir/tools/StructureDefinition/profile-summary">
    <valueString value="**mustSupport**
When this profile has defined an element as mustSupport, the sender must provide
     the element value when available, and the receiver must accept the element value,
     persist the value and when appropriate, provide function as defined in the profile.
     When mustSupport is defined at a complex element level, all sub-elements inherit

When this profile has defined an element as mustSupport, the sender must provide
     the element value when available, and the receiver must accept the element value,
     persist the value and when appropriate, provide function as defined in the profile.
     When mustSupport is defined at a complex element level, all sub-elements inherit

     mustSupport."/> 
  </extension> 
  <url value="http://hl7.org/fhir/StructureDefinition/computablevalueset"/> 
  <identifier> 
    <system value="urn:ietf:rfc:3986"/> 
    <value value="urn:oid:2.16.840.1.113883.4.642.5.1212"/> 
  </identifier> 
  

  <version value="6.0.0-ballot2"/> 
  <name value="ComputableValueSet"/> 
  <title value="Computable ValueSet"/> 
  <status value="draft"/> 
  <experimental value="false"/> 
  <date value="2020-12-28T16:55:11+11:00"/> 
  
  Defines a computable value set as one that SHALL have an expression-based definition
   (i.e. a value set defined intensionally using expressions of the code systems involved)
   and MAY have an expansion included. The expression-based definition SHALL be represented
   in only one of three ways; using the compose element, using the expression extension,
   or using the rules-text extension to provide a step-by-step process for expanding

  <publisher value="HL7 International / Terminology Infrastructure"/> 
  <contact> 
    <telecom> 
      <system value="url"/> 
      <value value="http://www.hl7.org/Special/committees/Vocab"/> 
    </telecom> 
  </contact> 
  <description value="Defines a computable value set as one that SHALL have an expression-based definition
   (i.e. a value set defined intensionally using expressions of the code systems involved)
   and MAY have an expansion included. The expression-based definition SHALL be represented
   in only one of three ways; using the compose element, using the expression extension,
   or using the rules-text extension to provide a step-by-step process for expanding

   the value set definition"/> 
  

  <fhirVersion value="6.0.0-ballot2"/> 
  <mapping> 
    <identity value="rim"/> 
    <uri value="http://hl7.org/v3"/> 
    <name value="RIM Mapping"/> 
  </mapping> 
  <mapping> 
    <identity value="workflow"/> 
    <uri value="http://hl7.org/fhir/workflow"/> 
    <name value="Workflow Pattern"/> 
  </mapping> 
  <mapping> 
    <identity value="w5"/> 
    <uri value="http://hl7.org/fhir/fivews"/> 
    <name value="FiveWs Pattern Mapping"/> 
  </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="ValueSet"/> 
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/shareablevalueset"/> 
  <derivation value="constraint"/> 
  <snapshot> 
    <element id="ValueSet">
      <path value="ValueSet"/> 
      <short value="A set of codes drawn from one or more code systems"/> 
      A value set that includes instructions for construction of the value set using
       one and only one of human instructions, machine instructions, or the value set

      <definition value="A value set that includes instructions for construction of the value set using
       one and only one of human instructions, machine instructions, or the value set

       compose element."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <constraint> 
        <key value="cnl-0"/> 
        <severity value="warning"/> 
        Name should be usable as an identifier for the module by machine processing applications

        <human value="Name should be usable as an identifier for the module by machine processing applications
         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/ValueSet"/> 
      </constraint> 
      <constraint> 
        <key value="cvs-1"/> 
        <severity value="error"/> 
        <human value="Only one of rulesText, expression, or a compose definition SHALL be provided"/> 
        extension('http://hl7.org/fhir/StructureDefinition/valueset-rules-text').exists()
         xor extension('http://hl7.org/fhir/StructureDefinition/valueset-expression').exists()

        <expression value="extension('http://hl7.org/fhir/StructureDefinition/valueset-rules-text').exists()
         xor extension('http://hl7.org/fhir/StructureDefinition/valueset-expression').exists()

         xor compose.exists()"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="conformance.behavior,conformance.terminology"/> 
      </mapping> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.id">
      <path value="ValueSet.id"/> 
      <short value="Logical id of this artifact"/> 
      The logical id of the resource, as used in the URL for the resource. Once assigned,

      <definition value="The logical id of the resource, as used in the URL for the resource. Once assigned,
       this value never changes."/> 
      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

      <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> 
      <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="ValueSet.meta">
      <path value="ValueSet.meta"/> 
      <short value="Metadata about the resource"/> 
      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

      <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."/> 
      <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="ValueSet.implicitRules">
      <path value="ValueSet.implicitRules"/> 
      <short value="A set of rules under which this content was created"/> 
      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

      <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."/> 
      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,

      <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"/> 
      This element is labeled as a modifier because the implicit rules may provide additional

      <isModifierReason value="This element is labeled as a modifier because the implicit rules may provide additional
       knowledge about the resource that modifies its meaning or interpretation"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.language">
      <path value="ValueSet.language"/> 
      <short value="Language of the resource content"/> 
      <definition value="The base language in which the resource is written."/> 
      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

      <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> 
        
          
        

        <strength value="required"/> 
        <description value="IETF language tag for a human language"/> 
        

        <valueSet value="http://hl7.org/fhir/ValueSet/all-languages|6.0.0-ballot2"/> 
        <additional> 
          <purpose value="starter"/> 
          <valueSet value="http://hl7.org/fhir/ValueSet/languages"/> 
        </additional> 
      </binding> 
    </element> 
    <element id="ValueSet.text">
      <path value="ValueSet.text"/> 
      <short value="Text summary of the resource, for human interpretation"/> 
      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

      <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."/> 
      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

      <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="ValueSet.contained">
      <path value="ValueSet.contained"/> 
      <short value="Contained, inline Resources"/> 
      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

      <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."/> 
      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,

      <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="ValueSet.extension">
      <path value="ValueSet.extension"/> 
      <slicing> 
        <discriminator> 
          <type value="value"/> 
          <path value="url"/> 
        </discriminator> 
        <ordered value="false"/> 
        <rules value="open"/> 
      </slicing> 
      <short value="Extension"/> 
      <definition value="An Extension"/> 
      <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> 
      
        
        
        
        
        
      

      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.extension:knowledgeRepresentationLevel">
      <path value="ValueSet.extension"/> 
      <sliceName value="knowledgeRepresentationLevel"/> 
      <short value="narrative | semi-structured | structured | executable"/> 
      <definition value="Defines a knowledge representation level provided by this knowledge artifact."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="DomainResource.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/cqf-knowledgeRepresentationLevel"/> 
      </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="true"/> 
      <isModifier value="false"/> 
    </element> 
    <element id="ValueSet.extension:authoritativeSource">
      <path value="ValueSet.extension"/> 
      <sliceName value="authoritativeSource"/> 
      Reference to the current trusted source of the ValueSet resource (metadata and

      <short value="Reference to the current trusted source of the ValueSet resource (metadata and
       definition)"/> 
      A reference to the authoritative accessible, persisted source of truth of the entire

      <definition value="A reference to the authoritative accessible, persisted source of truth of the entire
       Value Set Definition, including textual information and available versions."/> 
      If this extension is not present, then the canonical URL (ValueSet.url) also serves
       the purpose of specifying the authoritative source.  A difference between the canonical
       URL and the authoritiative source might arise in some cases due to ongoing organization
       restructuring, etc., and in those cases this extension may be used.  The URL of
       the authoritative source is intended to be resolvable but that cannot be guaranteed.
       The designated &quot;authoritative source&quot; is normally expected to be able
       to generate a valid expansion of the value set, and if for some reason it cannot

      <comment value="If this extension is not present, then the canonical URL (ValueSet.url) also serves
       the purpose of specifying the authoritative source.  A difference between the canonical
       URL and the authoritiative source might arise in some cases due to ongoing organization
       restructuring, etc., and in those cases this extension may be used.  The URL of
       the authoritative source is intended to be resolvable but that cannot be guaranteed.
       The designated &quot;authoritative source&quot; is normally expected to be able
       to generate a valid expansion of the value set, and if for some reason it cannot

       then the valueset-trusted-expansion should be used."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="DomainResource.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-authoritativeSource"/> 
      </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="true"/> 
      <isModifier value="false"/> 
    </element> 
    <element id="ValueSet.extension:rulesText">
      <path value="ValueSet.extension"/> 
      <sliceName value="rulesText"/> 
      <short value="Human instructions for constructing the valueset"/> 
      An expression that provides a definition of the content of the value set in some
       form that is not computable - e.g. instructions that could only be followed by

      <definition value="An expression that provides a definition of the content of the value set in some
       form that is not computable - e.g. instructions that could only be followed by

       a human."/> 
      Only one of rulesText, expression, or compose SHALL be provided for any given value
       set instance. Note that to provide a human-readable description of the expression,

      <comment value="Only one of rulesText, expression, or compose SHALL be provided for any given value
       set instance. Note that to provide a human-readable description of the expression,

       use the description element of the expression datatype."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="DomainResource.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-rules-text"/> 
      </type> 
      <condition value="cvs-1"/> 
      <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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.extension:expression">
      <path value="ValueSet.extension"/> 
      <sliceName value="expression"/> 
      <short value="Machine instructions for constructing the value set"/> 
      An expression that provides the computable definition for the content of the value
       set. The value set can only be expanded by a server that understands the expression

      <definition value="An expression that provides the computable definition for the content of the value
       set. The value set can only be expanded by a server that understands the expression

       syntax used."/> 
      Only one of rulesText, expression, or compose SHALL be provided for any given value
       set instance. Note that to provide a human-readable description of the expression,

      <comment value="Only one of rulesText, expression, or compose SHALL be provided for any given value
       set instance. Note that to provide a human-readable description of the expression,

       use the description element of the expression datatype."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="DomainResource.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-expression"/> 
      </type> 
      <condition value="cvs-1"/> 
      <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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.extension:supplement">
      <path value="ValueSet.extension"/> 
      <sliceName value="supplement"/> 
      <short value="Declares dependency on a particular supplment"/> 
      This extension declares that a value set depends on a particular [CodeSystem supplement](code

      <definition value="This extension declares that a value set depends on a particular [CodeSystem supplement](code
      system.html#supplements) and should not be used in its absence."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="DomainResource.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-supplement"/> 
      </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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.modifierExtension">
      <path value="ValueSet.modifierExtension"/> 
      <short value="Extensions that cannot be ignored"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <mustSupport value="false"/> 
      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.url">
      <path value="ValueSet.url"/> 
      <short value="Canonical identifier for this value set, represented as a URI (globally unique)"/> 
      An absolute URI that is used to identify this value set 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 value set is (or will be) published. This URL can be the target
       of a canonical reference. It SHALL remain the same when the value set is stored

      <definition value="An absolute URI that is used to identify this value set 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 value set is (or will be) published. This URL can be the target
       of a canonical reference. It SHALL remain the same when the value set is stored

       on different servers."/> 
      Can be a urn:uuid: or a urn:oid: but real http: addresses are preferred.  Multiple

      <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).

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)

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 value set to be referenced by a single globally unique identifier."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.url"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="uri"/> 
      </type> 
      <constraint> 
        <key value="cnl-1"/> 
        <severity value="warning"/> 
        URL should not contain | or # - these characters make processing canonical references

        <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/ValueSet"/> 
      </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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.identifier"/> 
      </mapping> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.identifier">
      <path value="ValueSet.identifier"/> 
      <short value="Additional identifier for the value set (business identifier)"/> 
      A formal identifier that is used to identify this value set when it is represented

      <definition value="A formal identifier that is used to identify this value set when it is represented
       in other formats, or referenced in a specification, model, design or an instance."/> 
      Typically, this is used for identifiers that can go in an HL7 V3 II (instance identifier)
       data type, and can then identify this value set outside of FHIR, where it is not

      <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 value set outside of FHIR, where it is not

       possible to use the logical URI."/> 
      Allows externally provided and/or usable business identifiers to be easily associated

      <requirements value="Allows externally provided and/or usable business identifiers to be easily associated
       with the module."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.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="objimpl"/> 
        <map value="no-gen-base"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.version">
      <path value="ValueSet.version"/> 
      <short value="Business version of the value set"/> 
      The identifier that is used to identify this version of the value set when it is
       referenced in a specification, model, design or instance. This is an arbitrary
       value managed by the value set 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

      <definition value="The identifier that is used to identify this version of the value set when it is
       referenced in a specification, model, design or instance. This is an arbitrary
       value managed by the value set 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 value set 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 value set with the format [url]|[version].

      <comment value="There may be different value set 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 value set with the format [url]|[version].

       The version SHOULD NOT contain a '#' - see [Business Version](resource.html#bv-format)."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.version"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.versionAlgorithm[x]">
      <path value="ValueSet.versionAlgorithm[x]"/> 
      <short value="How to compare versions"/> 
      Indicates the mechanism used to compare versions to determine which ValueSet is

      <definition value="Indicates the mechanism used to compare versions to determine which ValueSet is
       more current."/> 
      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

      <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="ValueSet.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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <binding> 
        <strength value="extensible"/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/version-algorithm"/> 
      </binding> 
    </element> 
    <element id="ValueSet.name">
      <path value="ValueSet.name"/> 
      <short value="Name for this value set (computer friendly)"/> 
      A natural language name identifying the value set. This name should be usable as

      <definition value="A natural language name identifying the value set. This name should be usable as
       an identifier for the module by machine processing applications such as code generation."/> 
      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.A name should be provided
       unless the value set is a contained resource (e.g. an anonymous value set in a

      <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.A name should be provided
       unless the value set is a contained resource (e.g. an anonymous value set in a

       profile). Most registries will require a name."/> 
      <requirements value="Support human navigation and code generation."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.name"/> 
        <min value="0"/> 
        <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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.title">
      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
        <valueBoolean value="true"/> 
      </extension> 
      
        
      

      <path value="ValueSet.title"/> 
      <short value="Name for this value set (human friendly)"/> 
      <definition value="A short, descriptive, user-friendly title for the value set."/> 
      This name does not need to be machine-processing friendly and may contain punctuation,

      <comment value="This name does not need to be machine-processing friendly and may contain punctuation,
       white-space, etc."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.status">
      <path value="ValueSet.status"/> 
      <short value="draft | active | retired | unknown"/> 
      The status of this value set. Enables tracking the life-cycle of the content. The
       status of the value set applies to the value set definition (ValueSet.compose)

      <definition value="The status of this value set. Enables tracking the life-cycle of the content. The
       status of the value set applies to the value set definition (ValueSet.compose)

       and the associated ValueSet metadata. Expansions do not have a state."/> 
      Allows filtering of value sets that are appropriate for use versus not.See also
       the [http://hl7.org/fhir/StructureDefinition/valueset-workflowStatusDescription](http://hl7.o
      rg/fhir/extensions/StructureDefinition-valueset-workflowStatusDescription.html)

      <comment value="Allows filtering of value sets that are appropriate for use versus not.See also
       the [http://hl7.org/fhir/StructureDefinition/valueset-workflowStatusDescription](http://hl7.o
      rg/fhir/extensions/StructureDefinition-valueset-workflowStatusDescription.html)

       extension for additional status information related to the editorial process.
See guidance around (not) making local changes to elements [here](canonicalresource.html#loca

See guidance around (not) making local changes to elements [here](canonicalresource.html#loca

      lization)."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.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="true"/> 
      <isModifier value="true"/> 
      This is labeled as &quot;Is Modifier&quot; because applications should not use

      <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> 
        
          
        

        <strength value="required"/> 
        <description value="The lifecycle status of an artifact."/> 
        

        <valueSet value="http://hl7.org/fhir/ValueSet/publication-status|6.0.0-ballot2"/> 
      </binding> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.status"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.experimental">
      <path value="ValueSet.experimental"/> 
      <short value="For testing purposes, not real usage"/> 
      A Boolean value to indicate that this value set is authored for testing purposes
       (or education/evaluation/marketing) and is not intended to be used for genuine

      <definition value="A Boolean value to indicate that this value set is authored for testing purposes
       (or education/evaluation/marketing) and is not intended to be used for genuine

       usage."/> 
      <comment value="Allows filtering of value sets that are appropriate for use versus not."/> 
      Enables experimental content to be developed following the same lifecycle that

      <requirements value="Enables experimental content to be developed following the same lifecycle that
       would be used for a production-level value set."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.class"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.date">
      <path value="ValueSet.date"/> 
      <short value="Date last changed"/> 
      The date (and optionally time) when the value set metadata or content logical definition

      <definition value="The date (and optionally time) when the value set metadata or content logical definition
       (.compose) was created or revised."/> 
      Note that this is not the same as the meta.lastUpdated which is specific to an
       instance of a value set resource on a server.  Additional specific dates may be
       added as extensions or be found by consulting Provenances associated with past

      <comment value="Note that this is not the same as the meta.lastUpdated which is specific to an
       instance of a value set resource on a server.  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

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="ValueSet.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> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.publisher">
      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
        <valueBoolean value="true"/> 
      </extension> 
      
        
      

      <path value="ValueSet.publisher"/> 
      <short value="Name of the publisher/steward (organization or individual)"/> 
      The name of the organization or individual responsible for the release and ongoing

      <definition value="The name of the organization or individual responsible for the release and ongoing
       maintenance of the value set."/> 
      Usually an organization but may be an individual. 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 value

      <comment value="Usually an organization but may be an individual. 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 value

       set. This item SHOULD be populated unless the information is available from context."/> 
      Helps establish the &quot;authority/credibility&quot; of the value set.  May also

      <requirements value="Helps establish the &quot;authority/credibility&quot; of the value set.  May also
       allow for contact."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.witness"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.contact">
      <path value="ValueSet.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

See guidance around (not) making local changes to elements [here](canonicalresource.html#loca

      lization)."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.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="ValueSet.description">
      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
        <valueBoolean value="true"/> 
      </extension> 
      
        
      

      <path value="ValueSet.description"/> 
      <short value="Natural language description of the value set"/> 
      A free text natural language description of the value set from a consumer's perspective.
       The textual description specifies the span of meanings for concepts to be included
       within the Value Set Expansion, and also may specify the intended use and limitations

      <definition value="A free text natural language description of the value set from a consumer's perspective.
       The textual description specifies the span of meanings for concepts to be included
       within the Value Set Expansion, and also may specify the intended use and limitations

       of the Value Set."/> 
      Description SHOULD contain instructions for clinical or administrative use and
       interpretation and information about misuse. Description SHOULD be populated unless
       the information is available from context. Description SHOULD be populated unless
       the value set is a contained resource (e.g. a value set defined solely in the context

      <comment value="Description SHOULD contain instructions for clinical or administrative use and
       interpretation and information about misuse. Description SHOULD be populated unless
       the information is available from context. Description SHOULD be populated unless
       the value set is a contained resource (e.g. a value set defined solely in the context

       of a profile)."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.useContext">
      
        
      

      <path value="ValueSet.useContext"/> 
      <short value="The context that the content is intended to support"/> 
      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

      <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 value set instances."/> 
      When multiple useContexts are specified, there is no expectation that all or any

      <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="ValueSet.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="ValueSet.jurisdiction">
      
        
      

      <path value="ValueSet.jurisdiction"/> 
      <short value="Intended jurisdiction for value set (if applicable)"/> 
      <definition value="A legal or geographic region in which the value set is intended to be used."/> 
      It may be possible for the value set to be used in jurisdictions other than those

      <comment value="It may be possible for the value set 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

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="ValueSet.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> 
        
          
        

        <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="ValueSet.immutable">
      <path value="ValueSet.immutable"/> 
      <short value="Indicates whether or not any change to the content logical definition may occur"/> 
      If this is set to 'true', then no new versions of the content logical definition

      <definition value="If this is set to 'true', then no new versions of the content logical definition
       can be created.  Note: Other metadata might still change."/> 
      Normally immutability is set to 'false', which is the default assumption if it
       is not populated.  Note that the implication is that if this is set to 'true',
       there may be only one ValueSet version for this definition. Immutability tends
       to be set to 'true' in one of two cases: - Where the value set, by the nature of
       its usage, cannot change.  For example &quot;All specializations of ACT in ActClassCode&quot;
       - Where there's no safe way to express the &quot;Purpose&quot; such that someone
       else could safely make changes to the value set definition. Source workflow control

      <comment value="Normally immutability is set to 'false', which is the default assumption if it
       is not populated.  Note that the implication is that if this is set to 'true',
       there may be only one ValueSet version for this definition. Immutability tends
       to be set to 'true' in one of two cases: - Where the value set, by the nature of
       its usage, cannot change.  For example &quot;All specializations of ACT in ActClassCode&quot;
       - Where there's no safe way to express the &quot;Purpose&quot; such that someone
       else could safely make changes to the value set definition. Source workflow control

       must guarantee that the same URI always yields the same definition."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.immutable"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="boolean"/> 
      </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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.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="ValueSet.purpose"/> 
      <short value="Why this value set is defined"/> 
      Explanation of why this value set is needed and why it has been designed as it

      <definition value="Explanation of why this value set is needed and why it has been designed as it
       has."/> 
      This element does not describe the usage of the value set. 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

      <comment value="This element does not describe the usage of the value set. 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 value set."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.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="ValueSet.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="ValueSet.copyright"/> 
      <short value="Use and/or publishing restrictions"/> 
      A copyright statement relating to the value set and/or its contents. Copyright
       statements are generally legal restrictions on the use and publishing of the value

      <definition value="A copyright statement relating to the value set and/or its contents. Copyright
       statements are generally legal restrictions on the use and publishing of the value

       set."/> 
      Frequently, the copyright differs between the value set and the codes that are
       included. The copyright statement should clearly differentiate between these when

      <comment value="Frequently, the copyright differs between the value set and the codes that are
       included. The copyright statement should clearly differentiate between these when

       required."/> 
      Consumers must be able to determine any legal restrictions on the use of the value

      <requirements value="Consumers must be able to determine any legal restrictions on the use of the value
       set and/or its content."/> 
      <alias value="License"/> 
      <alias value="Restrictions"/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.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="ValueSet.copyrightLabel">
      
        
      

      <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="ValueSet.copyrightLabel"/> 
      <short value="Copyright holder and year(s)"/> 
      A short string (&lt;50 characters), suitable for inclusion in a page footer that
       identifies the copyright holder, effective period, and optionally whether rights

      <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')."/> 
      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,

      <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="ValueSet.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="ValueSet.approvalDate">
      
        
      

      <path value="ValueSet.approvalDate"/> 
      <short value="When the ValueSet was approved by publisher"/> 
      The date on which the resource content was approved by the publisher. Approval

      <definition value="The date on which the resource content was approved by the publisher. Approval
       happens once when the content is officially approved for usage."/> 
      The 'date' element may be more recent than the approval date because of minor changes

      <comment value="The 'date' element may be more recent than the approval date because of minor changes
       or editorial corrections.
See guidance around (not) making local changes to elements [here](canonicalresource.html#loca

See guidance around (not) making local changes to elements [here](canonicalresource.html#loca

      lization)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.approvalDate"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="date"/> 
      </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="ValueSet.lastReviewDate">
      
        
      

      <path value="ValueSet.lastReviewDate"/> 
      <short value="When the ValueSet was last reviewed by the publisher"/> 
      The date on which the resource content was last reviewed. Review happens periodically

      <definition value="The date on which the resource content was last reviewed. Review happens periodically
       after approval but does not change the original approval date."/> 
      <comment value="If specified, this date follows the original approval date.
See guidance around (not) making local changes to elements [here](canonicalresource.html#loca

See guidance around (not) making local changes to elements [here](canonicalresource.html#loca

      lization)."/> 
      Gives a sense of how &quot;current&quot; the content is.  Resources that have not

      <requirements value="Gives a sense of how &quot;current&quot; the content is.  Resources that have not
       been reviewed in a long time may have a risk of being less appropriate/relevant."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.lastReviewDate"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="date"/> 
      </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="ValueSet.effectivePeriod">
      
        
      

      <path value="ValueSet.effectivePeriod"/> 
      <short value="When the ValueSet is expected to be used"/> 
      The period during which the ValueSet content was or is planned to be in active

      <definition value="The period during which the ValueSet content was or is planned to be in active
       use."/> 
      The effective period for a ValueSet determines when the content is applicable for
       usage and is independent of publication and review dates. For example, a valueset

      <comment value="The effective period for a ValueSet determines when the content is applicable for
       usage and is independent of publication and review dates. For example, a valueset

       intended to be used for the year 2016 might be published in 2015.
See guidance around (not) making local changes to elements [here](canonicalresource.html#loca

See guidance around (not) making local changes to elements [here](canonicalresource.html#loca

      lization)."/> 
      Allows establishing a transition before a resource comes into effect and also allows
       for a sunsetting process when new versions of the ValueSet are or are expected

      <requirements value="Allows establishing a transition before a resource comes into effect and also allows
       for a sunsetting process when new versions of the ValueSet are or are expected

       to be used instead."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.effectivePeriod"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="Period"/> 
      </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="objimpl"/> 
        <map value="no-gen-base"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.topic">
      
        
      

      <path value="ValueSet.topic"/> 
      <short value="E.g. Education, Treatment, Assessment, etc"/> 
      Descriptions related to the content of the ValueSet. Topics provide a high-level
       categorization as well as keywords for the ValueSet that can be useful for filtering

      <definition value="Descriptions related to the content of the ValueSet. Topics provide a high-level
       categorization as well as keywords for the ValueSet that can be useful for filtering

       and searching."/> 
      DEPRECATION NOTE: For consistency, implementations are encouraged to migrate to
       using the new 'topic' code in the useContext element.  (I.e. useContext.code indicating
       http://terminology.hl7.org/CodeSystem/usage-context-type#topic and useContext.valueCodeableCo

      <comment value="DEPRECATION NOTE: For consistency, implementations are encouraged to migrate to
       using the new 'topic' code in the useContext element.  (I.e. useContext.code indicating
       http://terminology.hl7.org/CodeSystem/usage-context-type#topic and useContext.valueCodeableCo

      ncept indicating the topic)"/> 
      Repositories must be able to determine how to categorize the ValueSet so that it

      <requirements value="Repositories must be able to determine how to categorize the ValueSet so that it
       can be found by topical and keyword searches."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.topic"/> 
        <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="false"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="DefinitionTopic"/> 
        </extension> 
        <strength value="example"/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/definition-topic"/> 
      </binding> 
    </element> 
    <element id="ValueSet.author">
      
        
      

      <path value="ValueSet.author"/> 
      <short value="Who authored the ValueSet"/> 
      An individiual or organization primarily involved in the creation and maintenance

      <definition value="An individiual or organization primarily involved in the creation and maintenance
       of the ValueSet."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.author"/> 
        <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="false"/> 
    </element> 
    <element id="ValueSet.editor">
      
        
      

      <path value="ValueSet.editor"/> 
      <short value="Who edited the ValueSet"/> 
      An individual or organization primarily responsible for internal coherence of the

      <definition value="An individual or organization primarily responsible for internal coherence of the
       ValueSet."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.editor"/> 
        <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="false"/> 
    </element> 
    <element id="ValueSet.reviewer">
      
        
      

      <path value="ValueSet.reviewer"/> 
      <short value="Who reviewed the ValueSet"/> 
      An individual or organization asserted by the publisher to be primarily responsible

      <definition value="An individual or organization asserted by the publisher to be primarily responsible
       for review of some aspect of the ValueSet."/> 
      See guidance around (not) making local changes to elements [here](canonicalresource.html#loca

      <comment value="See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.reviewer"/> 
        <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="false"/> 
    </element> 
    <element id="ValueSet.endorser">
      
        
      

      <path value="ValueSet.endorser"/> 
      <short value="Who endorsed the ValueSet"/> 
      An individual or organization asserted by the publisher to be responsible for officially

      <definition value="An individual or organization asserted by the publisher to be responsible for officially
       endorsing the ValueSet for use in some setting."/> 
      See guidance around (not) making local changes to elements [here](canonicalresource.html#loca

      <comment value="See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.endorser"/> 
        <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="false"/> 
    </element> 
    <element id="ValueSet.relatedArtifact">
      
        
      

      <path value="ValueSet.relatedArtifact"/> 
      <short value="Additional documentation, citations, etc"/> 
      Related artifacts such as additional documentation, justification, dependencies,

      <definition value="Related artifacts such as additional documentation, justification, dependencies,
       bibliographic references, and predecessor and successor artifacts."/> 
      Each related artifact is either an attachment, or a reference to another resource,

      <comment value="Each related artifact is either an attachment, or a reference to another resource,
       but not both."/> 
      A ValueSet must be able to provide enough information for consumers of the content
       (and/or interventions or results produced by the content) to be able to determine

      <requirements value="A ValueSet must be able to provide enough information for consumers of the content
       (and/or interventions or results produced by the content) to be able to determine

       and understand the justification for and evidence in support of the content."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.relatedArtifact"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="RelatedArtifact"/> 
      </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="ValueSet.compose">
      <path value="ValueSet.compose"/> 
      <short value="Content logical definition of the value set (CLD)"/> 
      A set of criteria that define the contents of the value set by including or excluding
       codes selected from the specified code system(s) that the value set draws from.

      <definition value="A set of criteria that define the contents of the value set by including or excluding
       codes selected from the specified code system(s) that the value set draws from.

       This is also known as the Content Logical Definition (CLD)."/> 
      <alias value="Content Logical Definition"/> 
      <alias value="CLD"/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose"/> 
        <min value="0"/> 
        <max value="1"/> 
      </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> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.compose.id">
      <path value="ValueSet.compose.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      Unique id for the element within a resource (for internal references). This may

      <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> 
      <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="ValueSet.compose.extension">
      <path value="ValueSet.compose.extension"/> 
      <short value="Additional content defined by implementations"/> 
      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 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

      <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 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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.modifierExtension">
      <path value="ValueSet.compose.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.compose.lockedDate">
      <path value="ValueSet.compose.lockedDate"/> 
      <short value="Fixed date for references with no specified version (transitive)"/> 
      The Locked Date is  the effective date that is used to determine the version of
       all referenced Code Systems and Value Set Definitions included in the compose that

      <definition value="The Locked Date is  the effective date that is used to determine the version of
       all referenced Code Systems and Value Set Definitions included in the compose that

       are not already tied to a specific version."/> 
      With a defined lockedDate the value set is considered &quot;Locked&quot;. Otherwise,
       the value set may have different expansions as underlying code systems and/or value
       sets evolve.  The interpretation of lockedDate is often dependent on the context
       - e.g. a SNOMED CT derived value set with a lockedDate will have a different expansion
       in USA than in UK.  If a value set specifies a version for include and exclude
       statements, and also specifies a locked date, the specified versions need to be

      <comment value="With a defined lockedDate the value set is considered &quot;Locked&quot;. Otherwise,
       the value set may have different expansions as underlying code systems and/or value
       sets evolve.  The interpretation of lockedDate is often dependent on the context
       - e.g. a SNOMED CT derived value set with a lockedDate will have a different expansion
       in USA than in UK.  If a value set specifies a version for include and exclude
       statements, and also specifies a locked date, the specified versions need to be

       available that date, or the value set will not be usable."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.lockedDate"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="date"/> 
      </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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.init"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.inactive">
      <path value="ValueSet.compose.inactive"/> 
      <short value="Whether inactive codes are in the value set"/> 
      Whether inactive codes - codes that are not approved for current use - are in the
       value set. If inactive = true, inactive codes are to be included in the expansion,
       if inactive = false, the inactive codes will not be included in the expansion.
       If absent, the behavior is determined by the implementation, or by the applicable

      <definition value="Whether inactive codes - codes that are not approved for current use - are in the
       value set. If inactive = true, inactive codes are to be included in the expansion,
       if inactive = false, the inactive codes will not be included in the expansion.
       If absent, the behavior is determined by the implementation, or by the applicable

       $expand parameters (but generally, inactive codes would be expected to be included)."/> 
      Note that in the FHIR terminology framework, &quot;deprecated&quot; does not mean
       inactive, but in some code systems, e.g. LOINC, &quot;deprecated&quot; does mean
       inactive. Code systems should define what codes are considered to be inactive.
       If this is not clearly defined (including in the FHIR code system resource), then

      <comment value="Note that in the FHIR terminology framework, &quot;deprecated&quot; does not mean
       inactive, but in some code systems, e.g. LOINC, &quot;deprecated&quot; does mean
       inactive. Code systems should define what codes are considered to be inactive.
       If this is not clearly defined (including in the FHIR code system resource), then

       all codes are assumed to be active.
The Value Set Definition specification defines an ActiveOnly element, which is
       the reverse of this element e.g. (ValueSet.compose.inactive=FALSE) is the same

The Value Set Definition specification defines an ActiveOnly element, which is
       the reverse of this element e.g. (ValueSet.compose.inactive=FALSE) is the same

       as (VSD.ActiveOnly=TRUE)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.inactive"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="boolean"/> 
      </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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.compose.include">
      
        
      

      <path value="ValueSet.compose.include"/> 
      <short value="Include one or more codes from a code system or other value set(s)"/> 
      <definition value="Include one or more codes from a code system or other value set(s)."/> 
      All the conditions in an include must be true. If a system is listed, all the codes
       from the system are listed. If one or more filters are listed, all of the filters
       must apply. If one or more value sets are listed, the codes must be in all the

      <comment value="All the conditions in an include must be true. If a system is listed, all the codes
       from the system are listed. If one or more filters are listed, all of the filters
       must apply. If one or more value sets are listed, the codes must be in all the

       value sets. E.g. each include is 'include all the codes that meet all these conditions'."/> 
      <min value="1"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.include"/> 
        <min value="1"/> 
        <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="vsd-1"/> 
        <severity value="error"/> 
        <human value="A value set include/exclude SHALL have a value set or a system"/> 
        <expression value="valueSet.exists() or system.exists()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <constraint> 
        <key value="vsd-2"/> 
        <severity value="error"/> 
        <human value="A value set with concepts or filters SHALL include a system"/> 
        <expression value="(concept.exists() or filter.exists()) implies system.exists()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <constraint> 
        <key value="vsd-3"/> 
        <severity value="error"/> 
        <human value="Cannot have both concept and filter"/> 
        <expression value="concept.empty() or filter.empty()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.id">
      <path value="ValueSet.compose.include.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      Unique id for the element within a resource (for internal references). This may

      <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> 
      <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="ValueSet.compose.include.extension">
      <path value="ValueSet.compose.include.extension"/> 
      <short value="Additional content defined by implementations"/> 
      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 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

      <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 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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.modifierExtension">
      <path value="ValueSet.compose.include.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.compose.include.system">
      <path value="ValueSet.compose.include.system"/> 
      <short value="The system the codes come from"/> 
      <definition value="An absolute URI which is the code system from which the selected codes come from."/> 
      If there are no codes or filters, the entire code system is included. Note that
       the set of codes that are included may contain abstract codes. See ''Coding.system''
       for further documentation about the correct value for the system element.

      <comment value="If there are no codes or filters, the entire code system is included. Note that
       the set of codes that are included may contain abstract codes. See ''Coding.system''
       for further documentation about the correct value for the system element.  If a
       contained code system is referenced, the entire canonical url must be provided.
       "/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.system"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="uri"/> 
      </type> 
      <condition value="vsd-2"/> 
      <condition value="vsd-1"/> 
      <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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.version">
      <path value="ValueSet.compose.include.version"/> 
      <short value="Specific version of the code system referred to"/> 
      The version of the code system that the codes are selected from, or the special

      <definition value="The version of the code system that the codes are selected from, or the special
       version '*' for all versions."/> 
      This is used when selecting the descendants of a concept - they may change between
       versions. If no version is specified, then the exact contents of the value set
       might not be known until a context of use binds it to a particular version. The
       special value '*' means all versions; It is at server discretion regarding expansions

      <comment value="This is used when selecting the descendants of a concept - they may change between
       versions. If no version is specified, then the exact contents of the value set
       might not be known until a context of use binds it to a particular version. The
       special value '*' means all versions; It is at server discretion regarding expansions

       and which versions must be supported."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept">
      
        
      

      <path value="ValueSet.compose.include.concept"/> 
      <short value="A concept defined in the system"/> 
      <definition value="Specifies a concept to be included or excluded."/> 
      The list of concepts is considered ordered, though the order might not have any
       particular significance. Typically, the order of an expansion follows that defined

      <comment value="The list of concepts is considered ordered, though the order might not have any
       particular significance. Typically, the order of an expansion follows that defined

       in the compose element."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.include.concept"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="BackboneElement"/> 
      </type> 
      <condition value="vsd-2"/> 
      <condition value="vsd-3"/> 
      <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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.id">
      <path value="ValueSet.compose.include.concept.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      Unique id for the element within a resource (for internal references). This may

      <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> 
      <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="ValueSet.compose.include.concept.extension">
      <path value="ValueSet.compose.include.concept.extension"/> 
      <short value="Additional content defined by implementations"/> 
      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 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

      <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 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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.modifierExtension">
      <path value="ValueSet.compose.include.concept.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.compose.include.concept.code">
      
        
      

      <path value="ValueSet.compose.include.concept.code"/> 
      <short value="Code or expression from system"/> 
      <definition value="Specifies a code for the concept to be included or excluded."/> 
      <comment value="Expressions are allowed if defined by the underlying code system."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.code"/> 
        <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="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.display">
      <path value="ValueSet.compose.include.concept.display"/> 
      <short value="Text to display for this code for this value set in this valueset"/> 
      The text to display to the user for this concept in the context of this valueset.
       If no display is provided, then applications using the value set use the display

      <definition value="The text to display to the user for this concept in the context of this valueset.
       If no display is provided, then applications using the value set use the display

       specified for the code by the system."/> 
      The value set resource allows for an alternative display to be specified for when
       this concept is used in this particular value set. See notes in the value set narrative

      <comment value="The value set resource allows for an alternative display to be specified for when
       this concept is used in this particular value set. See notes in the value set narrative

       about the correct use of this element."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.display"/> 
        <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"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation">
      <path value="ValueSet.compose.include.concept.designation"/> 
      <short value="Additional representations for this concept"/> 
      Additional representations for this concept when used in this value set - other

      <definition value="Additional representations for this concept when used in this value set - other
       languages, aliases, specialized purposes, used for particular purposes, etc."/> 
      Concepts have both a ```display``` and an array of ```designation```. The display
       is equivalent to a special designation with an implied ```designation.use``` of
       &quot;primary code&quot; and a language equal to the [Resource Language](resource.html#langua

      <comment value="Concepts have both a ```display``` and an array of ```designation```. The display
       is equivalent to a special designation with an implied ```designation.use``` of
       &quot;primary code&quot; and a language equal to the [Resource Language](resource.html#langua

      ge)."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.designation"/> 
        <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="vsd-11"/> 
        <severity value="error"/> 
        Must have a value for concept.designation.use if concept.designation.additionalUse

        <human value="Must have a value for concept.designation.use if concept.designation.additionalUse
         is present"/> 
        <expression value="additionalUse.exists() implies use.exists()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation.id">
      <path value="ValueSet.compose.include.concept.designation.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      Unique id for the element within a resource (for internal references). This may

      <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> 
      <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="ValueSet.compose.include.concept.designation.extension">
      <path value="ValueSet.compose.include.concept.designation.extension"/> 
      <short value="Additional content defined by implementations"/> 
      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 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

      <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 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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation.modifierExtension">
      <path value="ValueSet.compose.include.concept.designation.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.compose.include.concept.designation.language">
      <path value="ValueSet.compose.include.concept.designation.language"/> 
      <short value="Human language of the designation"/> 
      <definition value="The language this designation is defined for."/> 
      <comment value="In the absence of a language, the resource language applies."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.designation.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> 
        
          
        

        <strength value="required"/> 
        <description value="IETF language tag for a human language"/> 
        

        <valueSet value="http://hl7.org/fhir/ValueSet/all-languages|6.0.0-ballot2"/> 
        <additional> 
          <purpose value="starter"/> 
          <valueSet value="http://hl7.org/fhir/ValueSet/languages"/> 
        </additional> 
      </binding> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation.use">
      <path value="ValueSet.compose.include.concept.designation.use"/> 
      <short value="Types of uses of designations"/> 
      <definition value="A code that represents types of uses of designations."/> 
      If no use is provided, the designation can be assumed to be suitable for general

      <comment value="If no use is provided, the designation can be assumed to be suitable for general
       display to a human user."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.designation.use"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="Coding"/> 
      </type> 
      <condition value="vsd-11"/> 
      <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="ConceptDesignationUse"/> 
        </extension> 
        <strength value="extensible"/> 
        <description value="Details of how a designation would be used."/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/designation-use"/> 
      </binding> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation.additionalUse">
      
        
      

      <path value="ValueSet.compose.include.concept.designation.additionalUse"/> 
      <short value="Additional ways how this designation would be used"/> 
      Additional codes that detail how this designation would be used, if there is more

      <definition value="Additional codes that detail how this designation would be used, if there is more
       than one use."/> 
      This was added rather than increasing the cardinality of .use to 0..* in order

      <comment value="This was added rather than increasing the cardinality of .use to 0..* in order
       to maintain backward compatibility."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.designation.additionalUse"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Coding"/> 
      </type> 
      <condition value="vsd-11"/> 
      <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="ConceptDesignationUse"/> 
        </extension> 
        <strength value="extensible"/> 
        <description value="Details of how a designation would be used."/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/designation-use"/> 
      </binding> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation.value">
      <path value="ValueSet.compose.include.concept.designation.value"/> 
      <short value="The text value for this designation"/> 
      <definition value="The text value for this designation."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.designation.value"/> 
        <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="false"/> 
    </element> 
    <element id="ValueSet.compose.include.filter">
      <path value="ValueSet.compose.include.filter"/> 
      <short value="Select codes/concepts by their properties (including relationships)"/> 
      Select concepts by specifying a matching criterion based on the properties (including
       relationships) defined by the system, or on filters defined by the system. If multiple

      <definition value="Select concepts by specifying a matching criterion based on the properties (including
       relationships) defined by the system, or on filters defined by the system. If multiple

       filters are specified within the include, they SHALL all be true."/> 
      Selecting codes by specifying filters based on properties is only possible where
       the underlying code system defines appropriate properties. Note that in some cases,
       the underlying code system defines the logical concepts but not the literal codes
       for the concepts. In such cases, the literal definitions may be provided by a third

      <comment value="Selecting codes by specifying filters based on properties is only possible where
       the underlying code system defines appropriate properties. Note that in some cases,
       the underlying code system defines the logical concepts but not the literal codes
       for the concepts. In such cases, the literal definitions may be provided by a third

       party."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.include.filter"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="BackboneElement"/> 
      </type> 
      <condition value="vsd-2"/> 
      <condition value="vsd-3"/> 
      <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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.filter.id">
      <path value="ValueSet.compose.include.filter.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      Unique id for the element within a resource (for internal references). This may

      <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> 
      <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="ValueSet.compose.include.filter.extension">
      <path value="ValueSet.compose.include.filter.extension"/> 
      <short value="Additional content defined by implementations"/> 
      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 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

      <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 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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.filter.modifierExtension">
      <path value="ValueSet.compose.include.filter.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.compose.include.filter.property">
      
        
      

      <path value="ValueSet.compose.include.filter.property"/> 
      <short value="A property/filter defined by the code system"/> 
      <definition value="A code that identifies a property or a filter defined in the code system."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.filter.property"/> 
        <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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.filter.op">
      <path value="ValueSet.compose.include.filter.op"/> 
      = | is-a | descendent-of | is-not-a | regex | in | not-in | generalizes | child-of

      <short value="= | is-a | descendent-of | is-not-a | regex | in | not-in | generalizes | child-of
       | descendent-leaf | exists"/> 
      <definition value="The kind of operation to perform as a part of the filter criteria."/> 
      In case filter.property represents a property of the system, the operation applies
       to the selected property. In case filter.property represents a filter of the system,

      <comment value="In case filter.property represents a property of the system, the operation applies
       to the selected property. In case filter.property represents a filter of the system,

       the operation SHALL match one of the CodeSystem.filter.operator values."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.filter.op"/> 
        <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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="FilterOperator"/> 
        </extension> 
        <strength value="required"/> 
        <description value="The kind of operation to perform as a part of a property based filter."/> 
        

        <valueSet value="http://hl7.org/fhir/ValueSet/filter-operator|6.0.0-ballot2"/> 
      </binding> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.filter.value">
      
        
      

      <path value="ValueSet.compose.include.filter.value"/> 
      <short value="Code from the system, or regex criteria, or boolean value for exists"/> 
      The match value may be either a code defined by the system, or a string value,
       which is a regex match on the literal string of the property value  (if the filter
       represents a property defined in CodeSystem) or of the system filter value (if
       the filter represents a filter defined in CodeSystem) when the operation is 'regex',
       or one of the values (true and false), when the operation is 'exists'.
      Use regex matching with care - full regex matching on every SNOMED CT term is prohibitive,

      <definition value="ValueSet.compose.include.filter.value is represented as a string, and the string
       value must be one of the three types below: 
When the filter operation (ValueSet.compose.include.filter.op) is equal to &quot;regex&quot;,
       the value (ValueSet.compose.include.filter.value) is a regex expression. This is
       used to match string values (including integer and decimal, if necessary).
When the filter operation (ValueSet.compose.include.filter.op) is equal to &quot;exists&quot;
      , the value (ValueSet.compose.include.filter.value) is a boolean and must be equal
       to &quot;true&quot; or &quot;false&quot;.
For all other filter operations (ValueSet.compose.include.filter.op) the value
       (ValueSet.compose.include.filter.value) represents a code."/> 
      <comment value="Use regex matching with care - full regex matching on every SNOMED CT term is prohibitive,
       for example."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.filter.value"/> 
        <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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.valueSet">
      <path value="ValueSet.compose.include.valueSet"/> 
      <short value="Select the contents included in this value set"/> 
      Selects the concepts found in this value set (based on its value set definition).
       This is an absolute URI that is a reference to ValueSet.url.  If multiple value
       sets are specified this includes the intersection of the contents of all of the

      <definition value="Selects the concepts found in this value set (based on its value set definition).
       This is an absolute URI that is a reference to ValueSet.url.  If multiple value
       sets are specified this includes the intersection of the contents of all of the

       referenced value sets."/> 
      The value set URI is either a logical reference to a defined value set such as
       a [SNOMED CT reference set](https://terminology.hl7.org/SNOMEDCT.html), or a direct
       reference to a value set definition using ValueSet.url. The reference might not
       refer to an actual FHIR ValueSet resource; in this case, whatever is referred to
       is an implicit definition of a value set that needs to be clear about how versions

      <comment value="The value set URI is either a logical reference to a defined value set such as
       a [SNOMED CT reference set](https://terminology.hl7.org/SNOMEDCT.html), or a direct
       reference to a value set definition using ValueSet.url. The reference might not
       refer to an actual FHIR ValueSet resource; in this case, whatever is referred to
       is an implicit definition of a value set that needs to be clear about how versions

       are resolved."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.include.valueSet"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="canonical"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </type> 
      <condition value="vsd-1"/> 
      <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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.copyright">
      
        
      

      <path value="ValueSet.compose.include.copyright"/> 
      <short value="A copyright statement for the specific code system included in the value set"/> 
      A copyright statement for the specific code system asserted by the containing ValueSet.compos
      e.include element's system value (if the associated ValueSet.compose.include.version
       element is not present); or the code system and version combination (if the associated

      <definition value="A copyright statement for the specific code system asserted by the containing ValueSet.compos
      e.include element's system value (if the associated ValueSet.compose.include.version
       element is not present); or the code system and version combination (if the associated

       ValueSet.compose.include.version element is present)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.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="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.exclude">
      <path value="ValueSet.compose.exclude"/> 
      <short value="Explicitly exclude codes from a code system or other value sets"/> 
      Exclude one or more codes from the value set based on code system filters and/or

      <definition value="Exclude one or more codes from the value set based on code system filters and/or
       other value sets."/> 
      Usually this is used to selectively exclude codes that were included by subsumption

      <comment value="Usually this is used to selectively exclude codes that were included by subsumption
       in the inclusions. Any display names specified for the codes are ignored."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.exclude"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <contentReference value="http://hl7.org/fhir/StructureDefinition/ValueSet#ValueSet.compose.include"/> 
      <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="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.property">
      
        
      

      <path value="ValueSet.compose.property"/> 
      <short value="Property to return if client doesn't override"/> 
      A property to return in the expansion, if the client doesn't ask for any particular
       properties. May be either a code from the code system definition (convenient) or
       a the formal URI that refers to the property. The special value '*' means all properties

      <definition value="A property to return in the expansion, if the client doesn't ask for any particular
       properties. May be either a code from the code system definition (convenient) or
       a the formal URI that refers to the property. The special value '*' means all properties

       known to the server."/> 
      <comment value="Note that property names can clash, so using a URI is recommended."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.property"/> 
        <min value="0"/> 
        <max value="*"/> 
      </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="ValueSet.expansion">
      <path value="ValueSet.expansion"/> 
      <short value="Used when the value set is &quot;expanded&quot;"/> 
      A value set can also be &quot;expanded&quot;, where the value set is turned into
       a simple collection of enumerated codes. This element holds the expansion, if it

      <definition value="A value set can also be &quot;expanded&quot;, where the value set is turned into
       a simple collection of enumerated codes. This element holds the expansion, if it

       has been performed."/> 
      Expansion is performed to produce a collection of codes that are ready to use for
       data entry or validation. Value set expansions are always considered to be stateless
       - they are a record of the set of codes in the value set at a point in time under

      <comment value="Expansion is performed to produce a collection of codes that are ready to use for
       data entry or validation. Value set expansions are always considered to be stateless
       - they are a record of the set of codes in the value set at a point in time under

       a given set of conditions, and are not subject to ongoing maintenance.
Expansion.parameter is  a simplified list of parameters - a subset of the features

Expansion.parameter is  a simplified list of parameters - a subset of the features

       of the [Parameters](parameters.html) resource."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion"/> 
        <min value="0"/> 
        <max value="1"/> 
      </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> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.id">
      <path value="ValueSet.expansion.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      Unique id for the element within a resource (for internal references). This may

      <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> 
      <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="ValueSet.expansion.extension">
      <path value="ValueSet.expansion.extension"/> 
      <short value="Additional content defined by implementations"/> 
      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 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

      <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 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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.expansion.modifierExtension">
      <path value="ValueSet.expansion.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.expansion.identifier">
      <path value="ValueSet.expansion.identifier"/> 
      <short value="Identifies the value set expansion (business identifier)"/> 
      An identifier that uniquely identifies this expansion of the valueset, based on
       a unique combination of the provided parameters, the system default parameters,
       and the underlying system code system versions etc. Systems may re-use the same
       identifier as long as those factors remain the same, and the expansion is the same,

      <definition value="An identifier that uniquely identifies this expansion of the valueset, based on
       a unique combination of the provided parameters, the system default parameters,
       and the underlying system code system versions etc. Systems may re-use the same
       identifier as long as those factors remain the same, and the expansion is the same,

       but are not required to do so. This is a business identifier."/> 
      <comment value="Typically, this uri is a UUID (e.g. urn:uuid:8230ff20-c97a-4167-a59d-dc2cb9df16dd)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.identifier"/> 
        <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="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.next">
      
        
      

      <path value="ValueSet.expansion.next"/> 
      <short value="Opaque urls for paging through expansion results"/> 
      As per paging Search results, the next URLs are opaque to the client, have no dictated

      <definition value="As per paging Search results, the next URLs are opaque to the client, have no dictated
       structure, and only the server understands them."/> 
      Clients SHOULD use the next link, if present, to page through expansion results
       in preference to using the offset and count parameters. Due to the optional nature
       of the next link, its absence does not necessarily indicate that it is the last
       page of results. Instead, as the offset and count parameters SHALL be populated
       when paging, clients can reliably use the count/offset parameters to determine

      <comment value="Clients SHOULD use the next link, if present, to page through expansion results
       in preference to using the offset and count parameters. Due to the optional nature
       of the next link, its absence does not necessarily indicate that it is the last
       page of results. Instead, as the offset and count parameters SHALL be populated
       when paging, clients can reliably use the count/offset parameters to determine

       whether the whole expansion is returned."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.next"/> 
        <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="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.timestamp">
      <path value="ValueSet.expansion.timestamp"/> 
      <short value="Time ValueSet expansion happened"/> 
      <definition value="The time at which the expansion was produced by the expanding system."/> 
      This SHOULD be a fully populated instant, but in some circumstances, value sets

      <comment value="This SHOULD be a fully populated instant, but in some circumstances, value sets
       are expanded by hand, and the expansion is published without that precision."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.timestamp"/> 
        <min value="1"/> 
        <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="false"/> 
    </element> 
    <element id="ValueSet.expansion.total">
      <path value="ValueSet.expansion.total"/> 
      <short value="Total number of codes in the expansion"/> 
      The total number of concepts in the expansion. If the number of concept nodes in
       this resource is less than the stated number, then the server can return more using

      <definition value="The total number of concepts in the expansion. If the number of concept nodes in
       this resource is less than the stated number, then the server can return more using

       the offset parameter."/> 
      <comment value="Paging only applies to flat expansions."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.total"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="integer"/> 
      </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="ValueSet.expansion.offset">
      <path value="ValueSet.expansion.offset"/> 
      <short value="Offset at which this resource starts"/> 
      If paging is being used, the offset at which this resource starts.  I.e. this resource
       is a partial view into the expansion. If paging is not being used, this element

      <definition value="If paging is being used, the offset at which this resource starts.  I.e. this resource
       is a partial view into the expansion. If paging is not being used, this element

       SHALL NOT be present."/> 
      Paging only applies to flat expansions. If a filter is applied, the count is the
       number of concepts that matched the filter, not the number of concepts in an unfiltered

      <comment value="Paging only applies to flat expansions. If a filter is applied, the count is the
       number of concepts that matched the filter, not the number of concepts in an unfiltered

       view of the expansion."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.offset"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="integer"/> 
      </type> 
      <meaningWhenMissing value="Paging is not being used"/> 
      <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="ValueSet.expansion.parameter">
      <path value="ValueSet.expansion.parameter"/> 
      <short value="Parameter that controlled the expansion process"/> 
      A parameter that controlled the expansion process. These parameters may be used
       by users of expanded value sets to check whether the expansion is suitable for

      <definition value="A parameter that controlled the expansion process. These parameters may be used
       by users of expanded value sets to check whether the expansion is suitable for

       a particular purpose, or to pick the correct expansion."/> 
      The server decides which parameters to include here, but at a minimum, the list
       SHOULD include all of the parameters that affect the $expand operation. If the
       expansion will be persisted all of these parameters SHALL be included. If the codeSystem
       on the server has a specified version then this version SHALL be provided as a

      <comment value="The server decides which parameters to include here, but at a minimum, the list
       SHOULD include all of the parameters that affect the $expand operation. If the
       expansion will be persisted all of these parameters SHALL be included. If the codeSystem
       on the server has a specified version then this version SHALL be provided as a

       parameter in the expansion (note that not all code systems have a version)."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.expansion.parameter"/> 
        <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> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.parameter.id">
      <path value="ValueSet.expansion.parameter.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      Unique id for the element within a resource (for internal references). This may

      <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> 
      <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="ValueSet.expansion.parameter.extension">
      <path value="ValueSet.expansion.parameter.extension"/> 
      <short value="Additional content defined by implementations"/> 
      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 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

      <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 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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.expansion.parameter.modifierExtension">
      <path value="ValueSet.expansion.parameter.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.expansion.parameter.name">
      <path value="ValueSet.expansion.parameter.name"/> 
      <short value="Name as assigned by the client or server"/> 
      Name of the input parameter to the $expand operation; may be a server-assigned
       name for additional default or other server-supplied parameters used to control

      <definition value="Name of the input parameter to the $expand operation; may be a server-assigned
       name for additional default or other server-supplied parameters used to control

       the expansion process."/> 
      <comment value="The names are assigned at the discretion of the server."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.parameter.name"/> 
        <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="false"/> 
    </element> 
    <element id="ValueSet.expansion.parameter.value[x]">
      <path value="ValueSet.expansion.parameter.value[x]"/> 
      <short value="Value of the named parameter"/> 
      <definition value="The value of the parameter."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.parameter.value[x]"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <type> 
        <code value="boolean"/> 
      </type> 
      <type> 
        <code value="integer"/> 
      </type> 
      <type> 
        <code value="decimal"/> 
      </type> 
      <type> 
        <code value="uri"/> 
      </type> 
      <type> 
        <code value="code"/> 
      </type> 
      <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="false"/> 
    </element> 
    <element id="ValueSet.expansion.property">
      
        
      

      <path value="ValueSet.expansion.property"/> 
      <short value="Additional information supplied about each concept"/> 
      A property defines an additional slot through which additional information can

      <definition value="A property defines an additional slot through which additional information can
       be provided about a concept."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.expansion.property"/> 
        <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> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.property.id">
      <path value="ValueSet.expansion.property.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      Unique id for the element within a resource (for internal references). This may

      <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> 
      <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="ValueSet.expansion.property.extension">
      <path value="ValueSet.expansion.property.extension"/> 
      <short value="Additional content defined by implementations"/> 
      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 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

      <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 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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.expansion.property.modifierExtension">
      <path value="ValueSet.expansion.property.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.expansion.property.code">
      
        
      

      <path value="ValueSet.expansion.property.code"/> 
      <short value="Identifies the property on the concepts, and when referred to in operations"/> 
      A code that is used to identify the property. The code is used in ValueSet.expansion.contains

      <definition value="A code that is used to identify the property. The code is used in ValueSet.expansion.contains
      .property.code."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.property.code"/> 
        <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="false"/> 
    </element> 
    <element id="ValueSet.expansion.property.uri">
      <path value="ValueSet.expansion.property.uri"/> 
      <short value="Formal identifier for the property"/> 
      Reference to the formal meaning of the property. One possible source of meaning

      <definition value="Reference to the formal meaning of the property. One possible source of meaning
       is the [Concept Properties](codesystem-concept-properties.html) code system."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.property.uri"/> 
        <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="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.contains">
      <path value="ValueSet.expansion.contains"/> 
      <short value="Codes in the value set"/> 
      <definition value="The codes that are contained in the value set expansion."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.expansion.contains"/> 
        <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="vsd-6"/> 
        <severity value="error"/> 
        <human value="SHALL have a code or a display"/> 
        <expression value="code.exists() or display.exists()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <constraint> 
        <key value="vsd-9"/> 
        <severity value="error"/> 
        <human value="SHALL have a code if not abstract"/> 
        <expression value="code.exists() or abstract = true"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <constraint> 
        <key value="vsd-10"/> 
        <severity value="error"/> 
        <human value="SHALL have a system if a code is present"/> 
        <expression value="code.empty() or system.exists()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.contains.id">
      <path value="ValueSet.expansion.contains.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      Unique id for the element within a resource (for internal references). This may

      <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> 
      <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="ValueSet.expansion.contains.extension">
      <path value="ValueSet.expansion.contains.extension"/> 
      <short value="Additional content defined by implementations"/> 
      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 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

      <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 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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.expansion.contains.modifierExtension">
      <path value="ValueSet.expansion.contains.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.expansion.contains.system">
      <path value="ValueSet.expansion.contains.system"/> 
      <short value="System value for the code"/> 
      An absolute URI which is the code system in which the code for this item in the

      <definition value="An absolute URI which is the code system in which the code for this item in the
       expansion is defined."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.contains.system"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="uri"/> 
      </type> 
      <condition value="vsd-10"/> 
      <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="ValueSet.expansion.contains.abstract">
      <path value="ValueSet.expansion.contains.abstract"/> 
      <short value="If user cannot select this entry"/> 
      If true, this entry is included in the expansion for navigational purposes, and

      <definition value="If true, this entry is included in the expansion for navigational purposes, and
       the user cannot select the code directly as a proper value."/> 
      This should not be understood to exclude its use for searching (e.g. by subsumption
       testing). The client should know whether it is appropriate for the user to select

      <comment value="This should not be understood to exclude its use for searching (e.g. by subsumption
       testing). The client should know whether it is appropriate for the user to select

       an abstract code or not."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.contains.abstract"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="boolean"/> 
      </type> 
      If this is not populated, systems can assume that the concept it not abstract.

      <meaningWhenMissing value="If this is not populated, systems can assume that the concept it not abstract.
       This SHALL always be populated for abstract concepts"/> 
      <condition value="vsd-9"/> 
      <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="ValueSet.expansion.contains.inactive">
      <path value="ValueSet.expansion.contains.inactive"/> 
      <short value="If concept is inactive in the code system"/> 
      If the concept is inactive in the code system that defines it. Inactive codes are
       those that are no longer to be used, but are maintained by the code system for
       understanding legacy data. It might not be known or specified whether a concept

      <definition value="If the concept is inactive in the code system that defines it. Inactive codes are
       those that are no longer to be used, but are maintained by the code system for
       understanding legacy data. It might not be known or specified whether a concept

       is inactive (and it may depend on the context of use)."/> 
      <comment value="This should only have a value if the concept is inactive."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.contains.inactive"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="boolean"/> 
      </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="ValueSet.expansion.contains.version">
      <path value="ValueSet.expansion.contains.version"/> 
      <short value="Version in which this code/display is defined"/> 
      The version of the code system from this code was taken. Note that a well-maintained
       code system does not need the version reported, because the meaning of codes is
       consistent across versions. However this cannot consistently be assured, and when

      <definition value="The version of the code system from this code was taken. Note that a well-maintained
       code system does not need the version reported, because the meaning of codes is
       consistent across versions. However this cannot consistently be assured, and when

       the meaning is not guaranteed to be consistent, the version SHOULD be exchanged."/> 
      The exact value of the version string is specified by the system from which the

      <comment value="The exact value of the version string is specified by the system from which the
       code is derived."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.contains.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="false"/> 
    </element> 
    <element id="ValueSet.expansion.contains.code">
      
        
      

      <path value="ValueSet.expansion.contains.code"/> 
      <short value="Code - if blank, this is not a selectable code"/> 
      The code for this item in the expansion hierarchy. If this code is missing the
       entry in the hierarchy is a place holder (abstract) and does not represent a valid

      <definition value="The code for this item in the expansion hierarchy. If this code is missing the
       entry in the hierarchy is a place holder (abstract) and does not represent a valid

       code in the value set."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.contains.code"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="code"/> 
      </type> 
      <condition value="vsd-6"/> 
      <condition value="vsd-9"/> 
      <condition value="vsd-10"/> 
      <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="ValueSet.expansion.contains.display">
      <path value="ValueSet.expansion.contains.display"/> 
      <short value="User display for the concept"/> 
      <definition value="The recommended display for this item in the expansion."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.contains.display"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <condition value="vsd-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"/> 
    </element> 
    <element id="ValueSet.expansion.contains.designation">
      <path value="ValueSet.expansion.contains.designation"/> 
      <short value="Additional representations for this item"/> 
      Additional representations for this item - other languages, aliases, specialized
       purposes, used for particular purposes, etc. These are relevant when the conditions

      <definition value="Additional representations for this item - other languages, aliases, specialized
       purposes, used for particular purposes, etc. These are relevant when the conditions

       of the expansion do not fix to a single correct representation."/> 
      <comment value="The designations provided must be based on the value set and code system definitions."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.expansion.contains.designation"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <contentReference value="http://hl7.org/fhir/StructureDefinition/ValueSet#ValueSet.compose.include.concept.designation"/> 
      <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="ValueSet.expansion.contains.property">
      
        
      
      
        
      

      <path value="ValueSet.expansion.contains.property"/> 
      <short value="Property value for the concept"/> 
      <definition value="A property value for this concept."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.expansion.contains.property"/> 
        <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> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.contains.property.id">
      <path value="ValueSet.expansion.contains.property.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      Unique id for the element within a resource (for internal references). This may

      <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> 
      <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="ValueSet.expansion.contains.property.extension">
      <path value="ValueSet.expansion.contains.property.extension"/> 
      <short value="Additional content defined by implementations"/> 
      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 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

      <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 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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.expansion.contains.property.modifierExtension">
      <path value="ValueSet.expansion.contains.property.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.expansion.contains.property.code">
      
        
      

      <path value="ValueSet.expansion.contains.property.code"/> 
      <short value="Reference to ValueSet.expansion.property.code"/> 
      <definition value="A code that is a reference to ValueSet.expansion.property.code."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.contains.property.code"/> 
        <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="false"/> 
    </element> 
    <element id="ValueSet.expansion.contains.property.value[x]">
      
        
      

      <path value="ValueSet.expansion.contains.property.value[x]"/> 
      <short value="Value of the property for this concept"/> 
      <definition value="The value of this property."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.contains.property.value[x]"/> 
        <min value="1"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="code"/> 
      </type> 
      <type> 
        <code value="Coding"/> 
      </type> 
      <type> 
        <code value="string"/> 
      </type> 
      <type> 
        <code value="integer"/> 
      </type> 
      <type> 
        <code value="boolean"/> 
      </type> 
      <type> 
        <code value="dateTime"/> 
      </type> 
      <type> 
        <code value="decimal"/> 
      </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="ValueSet.expansion.contains.property.subProperty">
      
        
      

      <path value="ValueSet.expansion.contains.property.subProperty"/> 
      <short value="SubProperty value for the concept"/> 
      <definition value="A subproperty value for this concept."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.expansion.contains.property.subProperty"/> 
        <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> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.contains.property.subProperty.id">
      <path value="ValueSet.expansion.contains.property.subProperty.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      Unique id for the element within a resource (for internal references). This may

      <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> 
      <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="ValueSet.expansion.contains.property.subProperty.extension">
      <path value="ValueSet.expansion.contains.property.subProperty.extension"/> 
      <short value="Additional content defined by implementations"/> 
      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 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

      <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 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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.expansion.contains.property.subProperty.modifierExtension">
      <path value="ValueSet.expansion.contains.property.subProperty.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.expansion.contains.property.subProperty.code">
      
        
      

      <path value="ValueSet.expansion.contains.property.subProperty.code"/> 
      <short value="Reference to ValueSet.expansion.property.code"/> 
      <definition value="A code that is a reference to ValueSet.expansion.property.code."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.contains.property.subProperty.code"/> 
        <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="false"/> 
    </element> 
    <element id="ValueSet.expansion.contains.property.subProperty.value[x]">
      
        
      

      <path value="ValueSet.expansion.contains.property.subProperty.value[x]"/> 
      <short value="Value of the subproperty for this concept"/> 
      <definition value="The value of this subproperty."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.contains.property.subProperty.value[x]"/> 
        <min value="1"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="code"/> 
      </type> 
      <type> 
        <code value="Coding"/> 
      </type> 
      <type> 
        <code value="string"/> 
      </type> 
      <type> 
        <code value="integer"/> 
      </type> 
      <type> 
        <code value="boolean"/> 
      </type> 
      <type> 
        <code value="dateTime"/> 
      </type> 
      <type> 
        <code value="decimal"/> 
      </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="ValueSet.expansion.contains.contains">
      <path value="ValueSet.expansion.contains.contains"/> 
      <short value="Codes contained under this entry"/> 
      <definition value="Other codes and entries contained under this entry in the hierarchy."/> 
      If the expansion uses this element, there is  no implication about the logical
       relationship between them, and the  structure cannot be used for logical inferencing.
       The structure  exists to provide navigational assistance for helping human users

      <comment value="If the expansion uses this element, there is  no implication about the logical
       relationship between them, and the  structure cannot be used for logical inferencing.
       The structure  exists to provide navigational assistance for helping human users

       to  locate codes in the expansion."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.expansion.contains.contains"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <contentReference value="http://hl7.org/fhir/StructureDefinition/ValueSet#ValueSet.expansion.contains"/> 
      <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="ValueSet.scope">
      
        
      

      <path value="ValueSet.scope"/> 
      Description of the semantic space the Value Set Expansion is intended to cover

      <short value="Description of the semantic space the Value Set Expansion is intended to cover
       and should further clarify the text in ValueSet.description"/> 
      Description of the semantic space the Value Set Expansion is intended to cover

      <definition value="Description of the semantic space the Value Set Expansion is intended to cover
       and should further clarify the text in ValueSet.description."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.scope"/> 
        <min value="0"/> 
        <max value="1"/> 
      </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> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.scope.id">
      <path value="ValueSet.scope.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      Unique id for the element within a resource (for internal references). This may

      <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> 
      <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="ValueSet.scope.extension">
      <path value="ValueSet.scope.extension"/> 
      <short value="Additional content defined by implementations"/> 
      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 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

      <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 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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.scope.modifierExtension">
      <path value="ValueSet.scope.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      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 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.

      <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 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

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

      <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."/> 
      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

      <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> 
      
        
        
        
        
        
      

      <isModifier value="true"/> 
      Modifier extensions are expected to modify the meaning or interpretation of the

      <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="ValueSet.scope.inclusionCriteria">
      <path value="ValueSet.scope.inclusionCriteria"/> 
      <short value="Criteria describing which concepts or codes should be included and why"/> 
      <definition value="Criteria describing which concepts or codes should be included and why."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.scope.inclusionCriteria"/> 
        <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="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.scope.exclusionCriteria">
      <path value="ValueSet.scope.exclusionCriteria"/> 
      <short value="Criteria describing which concepts or codes should be excluded and why"/> 
      <definition value="Criteria describing which concepts or codes should be excluded and why."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.scope.exclusionCriteria"/> 
        <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="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
  </snapshot> 
  <differential> 
    <element id="ValueSet">
      <path value="ValueSet"/> 
      A value set that includes instructions for construction of the value set using
       one and only one of human instructions, machine instructions, or the value set

      <definition value="A value set that includes instructions for construction of the value set using
       one and only one of human instructions, machine instructions, or the value set

       compose element."/> 
      <constraint> 
        <key value="cvs-1"/> 
        <severity value="error"/> 
        <human value="Only one of rulesText, expression, or a compose definition SHALL be provided"/> 
        extension('http://hl7.org/fhir/StructureDefinition/valueset-rules-text').exists()
         xor extension('http://hl7.org/fhir/StructureDefinition/valueset-expression').exists()

        <expression value="extension('http://hl7.org/fhir/StructureDefinition/valueset-rules-text').exists()
         xor extension('http://hl7.org/fhir/StructureDefinition/valueset-expression').exists()

         xor compose.exists()"/> 
      </constraint> 
      <mustSupport value="false"/> 
    </element> 
    <element id="ValueSet.extension:rulesText">
      <path value="ValueSet.extension"/> 
      <sliceName value="rulesText"/> 
      <short value="Human instructions for constructing the valueset"/> 
      An expression that provides a definition of the content of the value set in some
       form that is not computable - e.g. instructions that could only be followed by

      <definition value="An expression that provides a definition of the content of the value set in some
       form that is not computable - e.g. instructions that could only be followed by

       a human."/> 
      Only one of rulesText, expression, or compose SHALL be provided for any given value
       set instance. Note that to provide a human-readable description of the expression,

      <comment value="Only one of rulesText, expression, or compose SHALL be provided for any given value
       set instance. Note that to provide a human-readable description of the expression,

       use the description element of the expression datatype."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-rules-text"/> 
      </type> 
      <condition value="cvs-1"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.extension:expression">
      <path value="ValueSet.extension"/> 
      <sliceName value="expression"/> 
      <short value="Machine instructions for constructing the value set"/> 
      An expression that provides the computable definition for the content of the value
       set. The value set can only be expanded by a server that understands the expression

      <definition value="An expression that provides the computable definition for the content of the value
       set. The value set can only be expanded by a server that understands the expression

       syntax used."/> 
      Only one of rulesText, expression, or compose SHALL be provided for any given value
       set instance. Note that to provide a human-readable description of the expression,

      <comment value="Only one of rulesText, expression, or compose SHALL be provided for any given value
       set instance. Note that to provide a human-readable description of the expression,

       use the description element of the expression datatype."/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-expression"/> 
      </type> 
      <condition value="cvs-1"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.extension:supplement">
      <path value="ValueSet.extension"/> 
      <sliceName value="supplement"/> 
      <min value="0"/> 
      <max value="1"/> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-supplement"/> 
      </type> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.immutable">
      <path value="ValueSet.immutable"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose">
      <path value="ValueSet.compose"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose.lockedDate">
      <path value="ValueSet.compose.lockedDate"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose.inactive">
      <path value="ValueSet.compose.inactive"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose.include">
      <path value="ValueSet.compose.include"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose.include.system">
      <path value="ValueSet.compose.include.system"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose.include.version">
      <path value="ValueSet.compose.include.version"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose.include.concept">
      <path value="ValueSet.compose.include.concept"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose.include.filter">
      <path value="ValueSet.compose.include.filter"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose.include.filter.property">
      <path value="ValueSet.compose.include.filter.property"/> 
      <min value="1"/> 
      <max value="1"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose.include.filter.op">
      <path value="ValueSet.compose.include.filter.op"/> 
      <min value="1"/> 
      <max value="1"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose.include.filter.value">
      <path value="ValueSet.compose.include.filter.value"/> 
      <min value="1"/> 
      <max value="1"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose.include.valueSet">
      <path value="ValueSet.compose.include.valueSet"/> 
      <mustSupport value="true"/> 
    </element> 
    <element id="ValueSet.compose.exclude">
      <path value="ValueSet.compose.exclude"/> 
      <mustSupport value="true"/> 
    </element> 
  </differential> 


</

StructureDefinition

>