<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="identifier-validDate" />
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="fhir" />
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="1" />
  </extension>
  <url value="http://hl7.org/fhir/StructureDefinition/identifier-validDate" />
  <name value="validDate" />
  <status value="draft" />
  <date value="2015-02-28" />
  <publisher value="Health Level Seven, Inc. - FHIR Core WG" />
  <contact>
    <telecom>
      <system value="url" />
      <value value="http://hl7.org/special/committees/FHIR" />
    </telecom>
  </contact>
  <description value="Indicates a date on which this identifier value was deemed to apply to this instance." />
  <fhirVersion value="3.0.1" />
  <mapping>
    <identity value="v2" />
    <uri value="http://hl7.org/v2" />
    <name value="HL7 v2 Mapping" />
  </mapping>
  <mapping>
    <identity value="rim" />
    <uri value="http://hl7.org/v3" />
    <name value="RIM Mapping" />
  </mapping>
  <kind value="complex-type" />
  <abstract value="false" />
  <contextType value="datatype" />
  <context value="Identifier" />
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension">
      <path value="Extension" />
      <short value="External Identifier associated with this element" />
      <definition value="Indicates a date on which this identifier value was deemed to apply to this instance." />
      <comment value="When referencing business objects where an identifier might not be globally unique but is instead re-used, allows determination of which object applies (on the presumption that the identifiers on the referenced object have an identifier.period or other metadata that indicates when that identifier was valid for the business object)." />
      <min value="0" />
      <max value="*" />
      <mapping>
        <identity value="v2" />
        <map value="N/A" />
      </mapping>
      <mapping>
        <identity value="rim" />
        <map value="n/a" />
      </mapping>
    </element>
    <element id="Extension.extension">
      <path value="Extension.extension" />
      <max value="0" />
    </element>
    <element id="Extension.url">
      <path value="Extension.url" />
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="http://hl7.org/fhir/StructureDefinition/identifier-validDate" />
    </element>
    <element id="Extension.valueDateTime">
      <path value="Extension.valueDateTime" />
      <type>
        <code value="dateTime" />
      </type>
    </element>
  </differential>
</StructureDefinition>