<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="spark421" />
  <meta>
    <versionId value="spark421" />
    <lastUpdated value="2015-10-02T12:28:24.652+00:00" />
  </meta>
  <url value="http://hl7.org/fhir/StructureDefinition/valueset-history" />
  <name value="What has happened over time" />
  <status value="draft" />
  <date value="2015-09-22T13:47:23+10:00" />
  <publisher value="HL7" />
  <description value="Information on changes made to the Value Set Definition over time, and also has a contained audit trail of all such changes." />
  <fhirVersion value="1.0.1" />
  <kind value="datatype" />
  <abstract value="false" />
  <contextType value="resource" />
  <context value="ValueSet" />
  <snapshot>
    <element id="Extension">
      <path value="Extension" />
      <short value="What has happened over time" />
      <definition value="Information on changes made to the Value Set Definition over time, and also has a contained audit trail of all such changes." />
      <min value="0" />
      <max value="*" />
      <type>
        <code value="Extension" />
      </type>
      <isModifier value="false" />
    </element>
  </snapshot>
  <differential>
    <element>
      <path value="Extension" />
      <short value="What has happened over time" />
      <definition value="Information on changes made to the Value Set Definition over time, and also has a contained audit trail of all such changes." />
      <min value="0" />
      <max value="*" />
      <type>
        <code value="Extension" />
      </type>
      <isModifier value="false" />
    </element>
    <element>
      <path value="Extension.extension" />
      <short value="The name of this set of history entries" />
      <definition value="Label for a set of entries, such as a version." />
      <min value="0" />
      <max value="1" />
      <type>
        <code value="Extension" />
      </type>
      <isModifier value="false" />
      <name value="name" />
      <comments value="Typically, a value set will have a set of history entries for each major publication milestone." />
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <max value="0" />
      <name value="extension" />
    </element>
    <element>
      <path value="Extension.extension.url" />
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="name" />
    </element>
    <element>
      <path value="Extension.extension.value[x]" />
      <min value="1" />
      <type>
        <code value="string" />
      </type>
    </element>
    <element>
      <path value="Extension.extension" />
      <short value="Audit of all changes for a history entry" />
      <definition value="A list of specific changes, who made them and when." />
      <min value="0" />
      <max value="*" />
      <type>
        <code value="Extension" />
      </type>
      <isModifier value="false" />
      <name value="revision" />
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <short value="Date the change was made" />
      <definition value="Date the change took place." />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="Extension" />
      </type>
      <isModifier value="false" />
      <name value="date" />
    </element>
    <element>
      <path value="Extension.extension.extension.extension" />
      <max value="0" />
      <name value="extension" />
    </element>
    <element>
      <path value="Extension.extension.extension.url" />
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="date" />
    </element>
    <element>
      <path value="Extension.extension.extension.value[x]" />
      <min value="1" />
      <type>
        <code value="dateTime" />
      </type>
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <short value="Version marker after the change was made" />
      <definition value="Unique id for the specific change." />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="Extension" />
      </type>
      <isModifier value="false" />
      <name value="id" />
    </element>
    <element>
      <path value="Extension.extension.extension.extension" />
      <max value="0" />
      <name value="extension" />
    </element>
    <element>
      <path value="Extension.extension.extension.url" />
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="id" />
    </element>
    <element>
      <path value="Extension.extension.extension.value[x]" />
      <min value="1" />
      <type>
        <code value="string" />
      </type>
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <short value="Who made the change" />
      <definition value="Person or device responsible for the change." />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="Extension" />
      </type>
      <isModifier value="false" />
      <name value="author" />
    </element>
    <element>
      <path value="Extension.extension.extension.extension" />
      <max value="0" />
      <name value="extension" />
    </element>
    <element>
      <path value="Extension.extension.extension.url" />
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="author" />
    </element>
    <element>
      <path value="Extension.extension.extension.value[x]" />
      <min value="1" />
      <type>
        <code value="string" />
      </type>
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <short value="Information about the change" />
      <definition value="Description of exactly what was changed and how." />
      <min value="0" />
      <max value="1" />
      <type>
        <code value="Extension" />
      </type>
      <isModifier value="false" />
      <name value="notes" />
    </element>
    <element>
      <path value="Extension.extension.extension.extension" />
      <max value="0" />
      <name value="extension" />
    </element>
    <element>
      <path value="Extension.extension.extension.url" />
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="notes" />
    </element>
    <element>
      <path value="Extension.extension.extension.value[x]" />
      <min value="1" />
      <type>
        <code value="string" />
      </type>
    </element>
    <element>
      <path value="Extension.extension.url" />
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="revision" />
    </element>
    <element>
      <path value="Extension.extension.value[x]" />
      <min value="0" />
      <max value="0" />
    </element>
    <element>
      <path value="Extension.url" />
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="http://hl7.org/fhir/StructureDefinition/valueset-history" />
    </element>
    <element>
      <path value="Extension.value[x]" />
      <min value="0" />
      <max value="0" />
    </element>
  </differential>
  <constrainedType value="Extension" />
  <base value="http://hl7.org/fhir/StructureDefinition/Extension" />
</StructureDefinition>