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

<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="id"/>
  <text>
    <status value="generated"/>
    <div xmlns="http://www.w3.org/1999/xhtml">to do</div>
  </text>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueString value="Normative"/>
  </extension>
  <url value="http://hl7.org/fhir/StructureDefinition/id"/>
  <name value="id"/>
  <status value="draft"/>
  <date value="2018-08-19T21:48:56+10:00"/>
  <publisher value="HL7 FHIR Standard"/>
  <contact>
    <telecom>
      <system value="url"/>
      <value value="http://hl7.org/fhir"/>
    </telecom>
  </contact>
  <description value="Base StructureDefinition for id type: Any combination of letters, numerals, &quot;-&quot; and &quot;.&quot;, with a length limit of 64 characters.  (This might be an integer, an unprefixed OID, UUID or any other identifier pattern that meets these constraints.)  Ids are case-insensitive."/>
  <fhirVersion value="3.5.0"/>
  <kind value="primitive-type"/>
  <abstract value="false"/>
  <type value="id"/>
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/string"/>
  <derivation value="specialization"/>
  <snapshot>
    <element id="id">
      <path value="id"/>
      <short value="Primitive Type id"/>
      <definition value="Any combination of letters, numerals, &quot;-&quot; and &quot;.&quot;, with a length limit of 64 characters.  (This might be an integer, an unprefixed OID, UUID or any other identifier pattern that meets these constraints.)  Ids are case-insensitive."/>
      <comment value="RFC 4122"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="id"/>
        <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())"/>
        <xpath value="@value|f:*|h:div"/>
        <source value="Element"/>
      </constraint>
      <isModifier value="false"/>
      <isSummary value="false"/>
    </element>
    <element id="id.id">
      <path value="id.id"/>
      <representation value="xmlAttr"/>
      <short value="xml:id (or equivalent in JSON)"/>
      <definition value="unique id for the element within a resource (for internal references)"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="Element.id"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="string"/>
      </type>
      <isModifier value="false"/>
      <isSummary value="false"/>
    </element>
    <element id="id.extension">
      <path value="id.extension"/>
      <short value="Additional Content defined by implementations"/>
      <definition value="May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
      <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>
      <isModifier value="false"/>
      <isSummary value="false"/>
    </element>
    <element id="id.value">
      <path value="id.value"/>
      <representation value="xmlAttr"/>
      <short value="Primitive value for id"/>
      <definition value="Primitive value for id"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="string.value"/>
        <min value="0"/>
        <max value="1"/>
      </base>
    <!-- Note: primitive values do not have an assigned type. e.g. this is compiler magic. XML, JSON and RDF types provided by extension -->
      <type>
        <extension url="http://hl7.org/fhir/StructureDefinition/regex">
          <valueString value="[A-Za-z0-9\-\.]{1,64}"/>
        </extension>
        <code>
          <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-json-type">
            <valueString value="string"/>
          </extension>
          <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-xml-type">
            <valueString value="xsd:string"/>
          </extension>
          <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-rdf-type">
            <valueString value="xsd:string"/>
          </extension>
        </code>
      </type>
      <isModifier value="false"/>
      <isSummary value="false"/>
    </element>
  </snapshot>
  <differential>
    <element id="id">
      <path value="id"/>
      <short value="Primitive Type id"/>
      <definition value="Any combination of letters, numerals, &quot;-&quot; and &quot;.&quot;, with a length limit of 64 characters.  (This might be an integer, an unprefixed OID, UUID or any other identifier pattern that meets these constraints.)  Ids are case-insensitive."/>
      <comment value="RFC 4122"/>
      <min value="0"/>
      <max value="*"/>
    </element>
    <element id="id.value">
      <path value="id.value"/>
      <representation value="xmlAttr"/>
      <short value="Primitive value for id"/>
      <definition value="Primitive value for id"/>
      <min value="0"/>
      <max value="1"/>
    <!-- Note: primitive values do not have an assigned type. e.g. this is compiler magic. XML, JSON and RDF types provided by extension -->
      <type>
        <extension url="http://hl7.org/fhir/StructureDefinition/regex">
          <valueString value="[A-Za-z0-9\-\.]{1,64}"/>
        </extension>
        <code>
          <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-json-type">
            <valueString value="string"/>
          </extension>
          <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-xml-type">
            <valueString value="xsd:string"/>
          </extension>
          <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-rdf-type">
            <valueString value="xsd:string"/>
          </extension>
        </code>
      </type>
    </element>
  </differential>
</StructureDefinition>