StructureDefinition for Extension

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           padding:0px 4px 0px 4pxOptional Extensions Element
            
            
            Elements defined in Ancestors: 
            Unique id for the element within a resource (for internal references). This may be any
             string value that does not contain spaces., 
            May be used to represent additional information that is not part of the basic definition
             of the element. To make the use of extensions safe and manageable, there is a strict set
             of governance  applied to the definition and use of extensions. Though any implementer
             can define an extension, there is a set of requirements that SHALL be met as part of the
             definition of the extension.
          
        

        
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            TRgwAAAABJRU5ErkJggg== 
            Extension.url : Source of the definition for the extension code - a logical name or a
             URL.
          
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            Extension.value[x] : Value of extension - must be one of a constrained set of the data
             types (see [Extensibility](extensibility.html) for a list).
          
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  Base StructureDefinition for Extension Type: Optional Extension Element - found in all
   resources.
  
  
  
    
    
    
  
  
  
  
  
  
  
    
      
        
      
      
        
      
      
      
      
      
      
      
        
        
        
      
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
      
      
      
        
        
      
      
        
        
      
    
    
      
      
      
      Unique id for the element within a resource (for internal references). This may be any
       string value that does not contain spaces.
      
      
      
        
        
        
      
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<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="Extension"/> 
  <text> 
    <status value="generated"/> 
    <div xmlns="http://www.w3.org/1999/xhtml">
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        <tr style="border: 1px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align:

         top">
          <th class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: white;

           border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom:
           3px">
            <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="The logical name of the element">Name</a>           </th>           <th class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: white;

           border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom:
           3px">
            <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Information about the use of the element">Flags</a>           </th>           <th class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: white;

           border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom:
           3px">
            <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Minimum and Maximum # of times the element can appear in the instance">Card.</a>           </th>           <th class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: white;

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           3px; width: 100px">
            <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Reference to the type of the element">Type</a>           </th>           <th class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: white;

           border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom:
           3px">
            <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Additional information about the element">Description &amp; Constraints</a>             <span style="float: right">              <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format">                <img alt="doco" src="data:(snipped in html view)" style="background-color: inherit"/>               </a>             </span>           </th>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: white;

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           border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="versions.html#std-process" style="padding-left: 3px; padding-right: 3px; border: 1px grey solid; font-weight: bold;

             color: black; background-color: #e6ffe6; padding-left: 3px; padding-right: 3px;
             border: 1px grey solid; font-weight: bold; color: black; background-color: #e6ffe6" title="Standards Status = Normative">N</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: white;

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

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

           border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px">Optional Extensions Element
            <br/>              <span style="font-style: italic" title="ext-1">+ Rule: Must have either extensions or value[x], not both</span>             <br/>              <br/>  Elements defined in Ancestors:             <a href="types.html#Element" title="Unique id for the element within a resource (for internal references). This may

             be any string value that does not contain spaces.">id</a> , 
            <a href="types.html#Element" title="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.">extension</a> 
          </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         #F7F7F7">
          <td class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7;

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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type"/>              <a href="extensibility-definitions.html#Extension.url" title="Extension.url : Source of the definition for the extension code - a logical name

             or a URL.">url</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7;

           border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null; padding-left: 3px; padding-right:

             3px; color: black; null" title="This element is included in summaries">Σ</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7;

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

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

           border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px">identifies the meaning of the extension
            <br/>            </td>         </tr>         <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color:

         white">
          <td class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: white;

           border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image:
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            <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: inherit"/>             <img alt="." class="hierarchy" src="data:(snipped in html view)" style="background-color: white; background-color: inherit" title="Data Type"/>              <a href="extensibility-definitions.html#Extension.value_x_" title="Extension.value[x] : Value of extension - must be one of a constrained set of the

             data types (see [Extensibility](extensibility.html) for a list).">value[x]</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: white;

           border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px">
            <a href="elementdefinition-definitions.html#ElementDefinition.isSummary" style="padding-left: 3px; padding-right: 3px; color: black; null; padding-left: 3px; padding-right:

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

             color: #301212; background-color: #fdf4f4;; padding-left: 3px; padding-right: 3px;
             border: 1px maroon solid; font-weight: bold; color: #301212; background-color:
             #fdf4f4;" title="This element has or is affected by some invariants">C</a> 
          </td>           <td class="hierarchy" style="vertical-align: top; text-align : var(--ig-left,left); background-color: white;

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

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

           border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px">Value of extension
            <br/>            </td>         </tr>         <tr>           <td class="hierarchy" colspan="5">            <br/>              <a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format">              <img alt="doco" src="data:(snipped in html view)" style="background-color: inherit"/>  Documentation for this format            </a>           </td>         </tr>       </table>     </div>   </text>   <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">    <valueCode value="normative"/>   </extension>   <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-normative-version">    <valueCode value="4.0.0"/>   </extension>   <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics">    <valueCode value="can-bind"/>   </extension>   <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">    <valueCode value="fhir"/>   </extension>   <url value="http://hl7.org/fhir/StructureDefinition/Extension"/>   <version value="6.0.0-ballot3"/>   <name value="Extension"/>   <status value="active"/>   <experimental value="false"/>   <date value="2025-11-08T11:23:29+00:00"/>   <publisher value="HL7 International / FHIR Infrastructure"/>   <contact>     <telecom>       <system value="url"/>       <value value="http://hl7.org/fhir"/>     </telecom>   </contact>   <contact>     <telecom>       <system value="url"/>       <value value="http://www.hl7.org/Special/committees/fiwg"/>     </telecom>   </contact>   <description value="Extension Type: Optional Extension Element - found in all resources."/>   <jurisdiction>     <coding>       <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/>       <code value="001"/>       <display value="World"/>     </coding>   </jurisdiction>   <purpose value="The ability to add extensions in a structured way is what keeps FHIR resources

   simple."/> 
  <fhirVersion value="6.0.0-ballot3"/>   <mapping>     <identity value="rim"/>     <uri value="http://hl7.org/v3"/>     <name value="RIM Mapping"/>   </mapping>   <kind value="complex-type"/>   <abstract value="false"/>   <type value="Extension"/>   <baseDefinition value="http://hl7.org/fhir/StructureDefinition/DataType"/>   <derivation value="specialization"/>   <snapshot>     <element id="Extension">      <path value="Extension"/>       <short value="Optional Extensions Element"/>       <definition value="Optional Extension Element - found in all resources."/>       <min value="0"/>       <max value="*"/>       <base>         <path value="Extension"/>         <min value="0"/>         <max value="*"/>       </base>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <constraint>         <key value="ext-1"/>         <severity value="error"/>         <human value="Must have either extensions or value[x], not both"/>         <expression value="extension.exists() != value.exists()"/>         <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>       </constraint>       <isModifier value="false"/>       <mapping>         <identity value="rim"/>         <map value="n/a,N/A"/>       </mapping>     </element>     <element id="Extension.id">      <path value="Extension.id"/>       <representation value="xmlAttr"/>       <short value="Unique id for inter-element referencing"/>       <definition value="Unique id for the element within a resource (for internal references). This may

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

       magic (j)  -->
      <type>         <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">          <valueUrl value="string"/>         </extension>         <code value="http://hl7.org/fhirpath/System.String"/>       </type>       <condition value="ele-1"/>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="n/a"/>       </mapping>     </element>     <element id="Extension.extension">      <path value="Extension.extension"/>       <slicing>         <discriminator>           <type value="value"/>           <path value="url"/>         </discriminator>         <description value="Extensions are always sliced by (at least) url"/>         <rules value="open"/>       </slicing>       <short value="Additional content defined by implementations"/> 
      <definition value="May be used to represent additional information that is not part of the basic definition
       of the element. To make the use of extensions safe and manageable, there is a strict set
       of governance  applied to the definition and use of extensions. Though any implementer
       can define an extension, there is a set of requirements that SHALL be met as part of the
       definition of the extension.
      There can be no stigma associated with the use of extensions by any application, project,
       or standard - regardless of the institution or jurisdiction that uses or defines the extensions.
        The use of extensions is what allows the FHIR specification to retain a core level of
       simplicity for everyone.
      
      
      
      
      
        
        
        
      
      
        
      
      
        
        
        
        
        
        
      
      
        
        
        
        
        
        
      
      
      
      
        
        
      
    
    
      
      
      
      
      The definition may point directly to a computable or human-readable definition of the
       extensibility codes, or it may be a logical URI as declared in some other specification.
       The definition SHALL be a URI for the Structure Definition defining the extension.
      
      
      
        
        
        
      
    <!--  Note: special primitive values have a FHIRPath system type. e.g. this is compiler magic
       (j)  -->
      
        
          
        
        
      
      
      
      
        
        
      
    
    
      
      
      Value of extension - must be one of a constrained set of the data types (see [Extensibility](extensi
      bility.html) for a list).
      
      
      
        
        
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
        
        
        
        
        
      
      
      
      
        
        
      
    
  
  
    
      
        
      
      
        
      
      
      
      
      
      
      
        
        
        
        
        
      
      
        
        
      
    
    
      
      
      
      
      The definition may point directly to a computable or human-readable definition of the
       extensibility codes, or it may be a logical URI as declared in some other specification.
       The definition SHALL be a URI for the Structure Definition defining the extension.
      
      
    <!--  Note: special primitive values have a FHIRPath system type. e.g. this is compiler magic
       (j)  -->
      
        
          
        
        
      
      
        
        
      
    
    
      
      
      Value of extension - must be one of a constrained set of the data types (see [Extensibility](extensi
      bility.html) for a list).
      
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
      
      
        
        
      
    
  

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

       project, or standard - regardless of the institution or jurisdiction that uses
       or defines the extensions.  The use of extensions is what allows the FHIR specification
       to retain a core level of simplicity for everyone."/> 
      <alias value="extensions"/>       <alias value="user content"/>       <min value="0"/>       <max value="*"/>       <base>         <path value="Element.extension"/>         <min value="0"/>         <max value="*"/>       </base>       <type>         <code value="Extension"/>       </type>       <constraint>         <key value="ele-1"/>         <severity value="error"/>         <human value="All FHIR elements must have a @value or children"/>         <expression value="hasValue() or (children().count() &gt; id.count())"/>         <source value="http://hl7.org/fhir/StructureDefinition/Element"/>       </constraint>       <isModifier value="false"/>       <isSummary value="false"/>       <mapping>         <identity value="rim"/>         <map value="n/a"/>       </mapping>     </element>     <element id="Extension.url">      <path value="Extension.url"/>       <representation value="xmlAttr"/>       <short value="identifies the meaning of the extension"/>       <definition value="Source of the definition for the extension code - a logical name or a URL."/>       <comment value="The definition may point directly to a computable or human-readable definition

       of the extensibility codes, or it may be a logical URI as declared in some other
       specification. The definition SHALL be a URI for the Structure Definition defining
       the extension."/> 
      <min value="1"/>       <max value="1"/>       <base>         <path value="Extension.url"/>         <min value="1"/>         <max value="1"/>       </base>       <!--  Note: special primitive values have a FHIRPath system type. e.g. this is compiler

       magic (j)  -->
      <type>         <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">          <valueUrl value="uri"/>         </extension>         <code value="http://hl7.org/fhirpath/System.String"/>       </type>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="rim"/>         <map value="N/A"/>       </mapping>     </element>     <element id="Extension.value[x]">      <path value="Extension.value[x]"/>       <short value="Value of extension"/>       <definition value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](

      extensibility.html) for a list)."/> 
      <min value="0"/>       <max value="1"/>       <base>         <path value="Extension.value[x]"/>         <min value="0"/>         <max value="1"/>       </base>       <type>         <code value="base64Binary"/>       </type>       <type>         <code value="boolean"/>       </type>       <type>         <code value="canonical"/>       </type>       <type>         <code value="code"/>       </type>       <type>         <code value="date"/>       </type>       <type>         <code value="dateTime"/>       </type>       <type>         <code value="decimal"/>       </type>       <type>         <code value="id"/>       </type>       <type>         <code value="instant"/>       </type>       <type>         <code value="integer"/>       </type>       <type>         <code value="integer64"/>       </type>       <type>         <code value="markdown"/>       </type>       <type>         <code value="oid"/>       </type>       <type>         <code value="positiveInt"/>       </type>       <type>         <code value="string"/>       </type>       <type>         <code value="time"/>       </type>       <type>         <code value="unsignedInt"/>       </type>       <type>         <code value="uri"/>       </type>       <type>         <code value="url"/>       </type>       <type>         <code value="uuid"/>       </type>       <type>         <code value="Address"/>       </type>       <type>         <code value="Age"/>       </type>       <type>         <code value="Annotation"/>       </type>       <type>         <code value="Attachment"/>       </type>       <type>         <code value="CodeableConcept"/>       </type>       <type>         <code value="CodeableReference"/>       </type>       <type>         <code value="Coding"/>       </type>       <type>         <code value="ContactPoint"/>       </type>       <type>         <code value="Count"/>       </type>       <type>         <code value="Distance"/>       </type>       <type>         <code value="Duration"/>       </type>       <type>         <code value="HumanName"/>       </type>       <type>         <code value="Identifier"/>       </type>       <type>         <code value="Money"/>       </type>       <type>         <code value="Period"/>       </type>       <type>         <code value="Quantity"/>       </type>       <type>         <code value="Range"/>       </type>       <type>         <code value="Ratio"/>       </type>       <type>         <code value="RatioRange"/>       </type>       <type>         <code value="Reference"/>       </type>       <type>         <code value="SampledData"/>       </type>       <type>         <code value="Signature"/>       </type>       <type>         <code value="Timing"/>       </type>       <type>         <code value="ContactDetail"/>       </type>       <type>         <code value="DataRequirement"/>       </type>       <type>         <code value="Expression"/>       </type>       <type>         <code value="ParameterDefinition"/>       </type>       <type>         <code value="RelatedArtifact"/>       </type>       <type>         <code value="TriggerDefinition"/>       </type>       <type>         <code value="UsageContext"/>       </type>       <type>         <code value="Availability"/>       </type>       <type>         <code value="ExtendedContactDetail"/>       </type>       <type>         <code value="VirtualServiceDetail"/>       </type>       <type>         <code value="Dosage"/>       </type>       <type>         <code value="Meta"/>       </type>       <condition value="ext-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>       <isModifier value="false"/>       <isSummary value="true"/>       <mapping>         <identity value="rim"/>         <map value="N/A"/>       </mapping>     </element>   </snapshot>   <differential>     <element id="Extension">      <path value="Extension"/>       <short value="Optional Extensions Element"/>       <definition value="Optional Extension Element - found in all resources."/>       <min value="0"/>       <max value="*"/>       <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>       <mapping>         <identity value="rim"/>         <map value="N/A"/>       </mapping>     </element>     <element id="Extension.url">      <path value="Extension.url"/>       <representation value="xmlAttr"/>       <short value="identifies the meaning of the extension"/>       <definition value="Source of the definition for the extension code - a logical name or a URL."/>       <comment value="The definition may point directly to a computable or human-readable definition

       of the extensibility codes, or it may be a logical URI as declared in some other
       specification. The definition SHALL be a URI for the Structure Definition defining
       the extension."/> 
      <min value="1"/>       <max value="1"/>       <!--  Note: special primitive values have a FHIRPath system type. e.g. this is compiler

       magic (j)  -->
      <type>         <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">          <valueUrl value="uri"/>         </extension>         <code value="http://hl7.org/fhirpath/System.String"/>       </type>       <isSummary value="true"/>       <mapping>         <identity value="rim"/>         <map value="N/A"/>       </mapping>     </element>     <element id="Extension.value[x]">      <path value="Extension.value[x]"/>       <short value="Value of extension"/>       <definition value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](

      extensibility.html) for a list)."/> 
      <min value="0"/>       <max value="1"/>       <type>         <code value="base64Binary"/>       </type>       <type>         <code value="boolean"/>       </type>       <type>         <code value="canonical"/>       </type>       <type>         <code value="code"/>       </type>       <type>         <code value="date"/>       </type>       <type>         <code value="dateTime"/>       </type>       <type>         <code value="decimal"/>       </type>       <type>         <code value="id"/>       </type>       <type>         <code value="instant"/>       </type>       <type>         <code value="integer"/>       </type>       <type>         <code value="integer64"/>       </type>       <type>         <code value="markdown"/>       </type>       <type>         <code value="oid"/>       </type>       <type>         <code value="positiveInt"/>       </type>       <type>         <code value="string"/>       </type>       <type>         <code value="time"/>       </type>       <type>         <code value="unsignedInt"/>       </type>       <type>         <code value="uri"/>       </type>       <type>         <code value="url"/>       </type>       <type>         <code value="uuid"/>       </type>       <type>         <code value="Address"/>       </type>       <type>         <code value="Age"/>       </type>       <type>         <code value="Annotation"/>       </type>       <type>         <code value="Attachment"/>       </type>       <type>         <code value="CodeableConcept"/>       </type>       <type>         <code value="CodeableReference"/>       </type>       <type>         <code value="Coding"/>       </type>       <type>         <code value="ContactPoint"/>       </type>       <type>         <code value="Count"/>       </type>       <type>         <code value="Distance"/>       </type>       <type>         <code value="Duration"/>       </type>       <type>         <code value="HumanName"/>       </type>       <type>         <code value="Identifier"/>       </type>       <type>         <code value="Money"/>       </type>       <type>         <code value="Period"/>       </type>       <type>         <code value="Quantity"/>       </type>       <type>         <code value="Range"/>       </type>       <type>         <code value="Ratio"/>       </type>       <type>         <code value="RatioRange"/>       </type>       <type>         <code value="Reference"/>       </type>       <type>         <code value="SampledData"/>       </type>       <type>         <code value="Signature"/>       </type>       <type>         <code value="Timing"/>       </type>       <type>         <code value="ContactDetail"/>       </type>       <type>         <code value="DataRequirement"/>       </type>       <type>         <code value="Expression"/>       </type>       <type>         <code value="ParameterDefinition"/>       </type>       <type>         <code value="RelatedArtifact"/>       </type>       <type>         <code value="TriggerDefinition"/>       </type>       <type>         <code value="UsageContext"/>       </type>       <type>         <code value="Availability"/>       </type>       <type>         <code value="ExtendedContactDetail"/>       </type>       <type>         <code value="VirtualServiceDetail"/>       </type>       <type>         <code value="Dosage"/>       </type>       <type>         <code value="Meta"/>       </type>       <condition value="ext-1"/>       <isSummary value="true"/>       <mapping>         <identity value="rim"/>         <map value="N/A"/>       </mapping>     </element>   </differential> 


</

StructureDefinition

>