<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="valueset-unclosed" />
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="vocab" />
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="1" />
  </extension>
  <url value="http://hl7.org/fhir/StructureDefinition/valueset-unclosed" />
  <name value="unclosed" />
  <status value="draft" />
  <date value="2017-04-19T07:44:43+10:00" />
  <publisher value="HL7" />
  <description value="Marks that the expansion is  incomplete, and values other than those listed may be valid. This may be used because post-coordinated codes are allowed, and no practical expansion can be produced." />
  <fhirVersion value="3.0.1" />
  <mapping>
    <identity value="rim" />
    <uri value="http://hl7.org/v3" />
    <name value="RIM Mapping" />
  </mapping>
  <kind value="complex-type" />
  <abstract value="false" />
  <contextType value="resource" />
  <context value="ValueSet.expansion" />
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension">
      <path value="Extension" />
      <short value="The expansion is incomplete (perhaps because of post-coordination)" />
      <definition value="Marks that the expansion is  incomplete, and values other than those listed may be valid. This may be used because post-coordinated codes are allowed, and no practical expansion can be produced." />
      <comment value="This extension exists to allow for definition and use of value sets that are currently unbounded, including those for which it may always be impractical to set bounds. This can be done to allow additional learning in this space, such as exploring poorly understsood consequences of alternatives." />
      <min value="0" />
      <max value="1" />
      <isModifier value="false" />
    </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/valueset-unclosed" />
    </element>
    <element id="Extension.valueBoolean">
      <path value="Extension.valueBoolean" />
      <type>
        <code value="boolean" />
      </type>
    </element>
  </differential>
</StructureDefinition>