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<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="valueset-history" />
  <url value="http://hl7.org/fhir/StructureDefinition/valueset-history" />
  <name value="What has happened over time" />
  <status value="draft" />
  <experimental value="false" />
  <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="1.6.0" />
  <kind value="datatype" />
  <abstract value="false" />
  <contextType value="resource" />
  <context value="ValueSet" />
  <baseType value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <snapshot>
    <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="*" />
      <base>
        <path value="Extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.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="*" />
      </base>
      <type>
        <code value="id" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="n/a" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension" />
      <slicing>
        <discriminator value="url.@type" />
        <ordered value="false" />
        <rules value="open" />
      </slicing>
      <short value="Extension" />
      <definition value="An Extension" />
      <min value="0" />
      <max value="*" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension" />
      <name value="name" />
      <short value="The name of this set of history entries" />
      <definition value="Label for a set of entries, such as a version." />
      <comments value="Typically, a value set will have a set of history entries for each major publication milestone." />
      <min value="0" />
      <max value="1" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.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="*" />
      </base>
      <type>
        <code value="id" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="n/a" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <name value="extension" />
      <short value="Extension" />
      <definition value="An Extension" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.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." />
      <comments 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 should be version specific.  This will ideally be the URI for the Resource Profile defining the extension, with the code for the extension after a #." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.url" />
        <min value="1" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="name" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.valueString" />
      <short value="Value of extension" />
      <definition value="Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list)." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="string" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension" />
      <name value="revision" />
      <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="*" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.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="*" />
      </base>
      <type>
        <code value="id" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="n/a" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <slicing>
        <discriminator value="url.@type" />
        <ordered value="false" />
        <rules value="open" />
      </slicing>
      <short value="Extension" />
      <definition value="An Extension" />
      <min value="0" />
      <max value="*" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <name value="date" />
      <short value="Date the change was made" />
      <definition value="Date the change took place." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.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="*" />
      </base>
      <type>
        <code value="id" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="n/a" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension.extension" />
      <name value="extension" />
      <short value="Extension" />
      <definition value="An Extension" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.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." />
      <comments 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 should be version specific.  This will ideally be the URI for the Resource Profile defining the extension, with the code for the extension after a #." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.url" />
        <min value="1" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="date" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension.valueDateTime" />
      <short value="Value of extension" />
      <definition value="Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list)." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="dateTime" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <name value="id" />
      <short value="Version marker after the change was made" />
      <definition value="Unique id for the specific change." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.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="*" />
      </base>
      <type>
        <code value="id" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="n/a" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension.extension" />
      <name value="extension" />
      <short value="Extension" />
      <definition value="An Extension" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.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." />
      <comments 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 should be version specific.  This will ideally be the URI for the Resource Profile defining the extension, with the code for the extension after a #." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.url" />
        <min value="1" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="id" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension.valueString" />
      <short value="Value of extension" />
      <definition value="Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list)." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="string" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <name value="author" />
      <short value="Who made the change" />
      <definition value="Person or device responsible for the change." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.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="*" />
      </base>
      <type>
        <code value="id" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="n/a" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension.extension" />
      <name value="extension" />
      <short value="Extension" />
      <definition value="An Extension" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.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." />
      <comments 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 should be version specific.  This will ideally be the URI for the Resource Profile defining the extension, with the code for the extension after a #." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.url" />
        <min value="1" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="author" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension.valueString" />
      <short value="Value of extension" />
      <definition value="Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list)." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="string" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <name value="notes" />
      <short value="Information about the change" />
      <definition value="Description of exactly what was changed and how." />
      <min value="0" />
      <max value="1" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.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="*" />
      </base>
      <type>
        <code value="id" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="n/a" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension.extension" />
      <name value="extension" />
      <short value="Extension" />
      <definition value="An Extension" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.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." />
      <comments 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 should be version specific.  This will ideally be the URI for the Resource Profile defining the extension, with the code for the extension after a #." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.url" />
        <min value="1" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="notes" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.extension.valueString" />
      <short value="Value of extension" />
      <definition value="Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list)." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="string" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.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." />
      <comments 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 should be version specific.  This will ideally be the URI for the Resource Profile defining the extension, with the code for the extension after a #." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.url" />
        <min value="1" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="revision" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension.value[x]" />
      <short value="Value of extension" />
      <definition value="Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list)." />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="boolean" />
      </type>
      <type>
        <code value="integer" />
      </type>
      <type>
        <code value="decimal" />
      </type>
      <type>
        <code value="base64Binary" />
      </type>
      <type>
        <code value="instant" />
      </type>
      <type>
        <code value="string" />
      </type>
      <type>
        <code value="uri" />
      </type>
      <type>
        <code value="date" />
      </type>
      <type>
        <code value="dateTime" />
      </type>
      <type>
        <code value="time" />
      </type>
      <type>
        <code value="code" />
      </type>
      <type>
        <code value="oid" />
      </type>
      <type>
        <code value="id" />
      </type>
      <type>
        <code value="unsignedInt" />
      </type>
      <type>
        <code value="positiveInt" />
      </type>
      <type>
        <code value="markdown" />
      </type>
      <type>
        <code value="Annotation" />
      </type>
      <type>
        <code value="Attachment" />
      </type>
      <type>
        <code value="Identifier" />
      </type>
      <type>
        <code value="CodeableConcept" />
      </type>
      <type>
        <code value="Coding" />
      </type>
      <type>
        <code value="Quantity" />
      </type>
      <type>
        <code value="Range" />
      </type>
      <type>
        <code value="Period" />
      </type>
      <type>
        <code value="Ratio" />
      </type>
      <type>
        <code value="SampledData" />
      </type>
      <type>
        <code value="Signature" />
      </type>
      <type>
        <code value="HumanName" />
      </type>
      <type>
        <code value="Address" />
      </type>
      <type>
        <code value="ContactPoint" />
      </type>
      <type>
        <code value="Timing" />
      </type>
      <type>
        <code value="Reference" />
      </type>
      <type>
        <code value="Meta" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <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." />
      <comments 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 should be version specific.  This will ideally be the URI for the Resource Profile defining the extension, with the code for the extension after a #." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.url" />
        <min value="1" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="http://hl7.org/fhir/StructureDefinition/valueset-history" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.value[x]" />
      <short value="Value of extension" />
      <definition value="Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list)." />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="boolean" />
      </type>
      <type>
        <code value="integer" />
      </type>
      <type>
        <code value="decimal" />
      </type>
      <type>
        <code value="base64Binary" />
      </type>
      <type>
        <code value="instant" />
      </type>
      <type>
        <code value="string" />
      </type>
      <type>
        <code value="uri" />
      </type>
      <type>
        <code value="date" />
      </type>
      <type>
        <code value="dateTime" />
      </type>
      <type>
        <code value="time" />
      </type>
      <type>
        <code value="code" />
      </type>
      <type>
        <code value="oid" />
      </type>
      <type>
        <code value="id" />
      </type>
      <type>
        <code value="unsignedInt" />
      </type>
      <type>
        <code value="positiveInt" />
      </type>
      <type>
        <code value="markdown" />
      </type>
      <type>
        <code value="Annotation" />
      </type>
      <type>
        <code value="Attachment" />
      </type>
      <type>
        <code value="Identifier" />
      </type>
      <type>
        <code value="CodeableConcept" />
      </type>
      <type>
        <code value="Coding" />
      </type>
      <type>
        <code value="Quantity" />
      </type>
      <type>
        <code value="Range" />
      </type>
      <type>
        <code value="Period" />
      </type>
      <type>
        <code value="Ratio" />
      </type>
      <type>
        <code value="SampledData" />
      </type>
      <type>
        <code value="Signature" />
      </type>
      <type>
        <code value="HumanName" />
      </type>
      <type>
        <code value="Address" />
      </type>
      <type>
        <code value="ContactPoint" />
      </type>
      <type>
        <code value="Timing" />
      </type>
      <type>
        <code value="Reference" />
      </type>
      <type>
        <code value="Meta" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </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="*" />
      <base>
        <path value="Extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension" />
      <name value="name" />
      <short value="The name of this set of history entries" />
      <definition value="Label for a set of entries, such as a version." />
      <comments value="Typically, a value set will have a set of history entries for each major publication milestone." />
      <min value="0" />
      <max value="1" />
      <base>
        <path value="Extension.extension" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <name value="extension" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Extension.extension.extension" />
        <min value="0" />
        <max value="0" />
      </base>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.url" />
      <min value="0" />
      <base>
        <path value="Extension.extension.url" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="name" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.value[x]" />
      <min value="1" />
      <base>
        <path value="Extension.extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="string" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension" />
      <name value="revision" />
      <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="*" />
      <base>
        <path value="Extension.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <name value="date" />
      <short value="Date the change was made" />
      <definition value="Date the change took place." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.extension.extension" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.extension" />
      <name value="extension" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Extension.extension.extension.extension" />
        <min value="0" />
        <max value="0" />
      </base>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.url" />
      <min value="0" />
      <base>
        <path value="Extension.extension.extension.url" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="date" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.value[x]" />
      <min value="1" />
      <base>
        <path value="Extension.extension.extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="dateTime" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <name value="id" />
      <short value="Version marker after the change was made" />
      <definition value="Unique id for the specific change." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.extension.extension" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.extension" />
      <name value="extension" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Extension.extension.extension.extension" />
        <min value="0" />
        <max value="0" />
      </base>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.url" />
      <min value="0" />
      <base>
        <path value="Extension.extension.extension.url" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="id" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.value[x]" />
      <min value="1" />
      <base>
        <path value="Extension.extension.extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="string" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <name value="author" />
      <short value="Who made the change" />
      <definition value="Person or device responsible for the change." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.extension.extension" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.extension" />
      <name value="extension" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Extension.extension.extension.extension" />
        <min value="0" />
        <max value="0" />
      </base>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.url" />
      <min value="0" />
      <base>
        <path value="Extension.extension.extension.url" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="author" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.value[x]" />
      <min value="1" />
      <base>
        <path value="Extension.extension.extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="string" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension" />
      <name value="notes" />
      <short value="Information about the change" />
      <definition value="Description of exactly what was changed and how." />
      <min value="0" />
      <max value="1" />
      <base>
        <path value="Extension.extension.extension" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.extension" />
      <name value="extension" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Extension.extension.extension.extension" />
        <min value="0" />
        <max value="0" />
      </base>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.url" />
      <min value="0" />
      <base>
        <path value="Extension.extension.extension.url" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="notes" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.extension.value[x]" />
      <min value="1" />
      <base>
        <path value="Extension.extension.extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="string" />
      </type>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.url" />
      <min value="0" />
      <base>
        <path value="Extension.extension.url" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="revision" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.extension.value[x]" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Extension.extension.value[x]" />
        <min value="0" />
        <max value="0" />
      </base>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.url" />
      <min value="0" />
      <base>
        <path value="Extension.url" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="http://hl7.org/fhir/StructureDefinition/valueset-history" />
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
    <element>
      <path value="Extension.value[x]" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Extension.value[x]" />
        <min value="0" />
        <max value="0" />
      </base>
      <maxLength value="0" />
      <mustSupport value="false" />
      <isModifier value="false" />
      <isSummary value="false" />
    </element>
  </differential>
</StructureDefinition>

name : What has happened over time

{

}

<name value="What has happened over time" />