<StructureDefinition xmlns="http://hl7.org/fhir">
  <meta>
    <lastUpdated value="2018-09-27T13:51:56.21+00:00" />
  </meta>
  <url value="http://example.org/fhir/StructureDefinition/MyTestExtension" />
  <name value="MyTestExtension" />
  <status value="draft" />
  <date value="2018-09-27T13:51:56.289919+00:00" />
  <fhirVersion value="3.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <contextType value="resource" />
  <context value="BodySite" />
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="http://example.org/fhir/StructureDefinition/MyTestExtension" />
    </element>
    <element id="Extension.value[x]:valueBoolean">
      <path value="Extension.valueBoolean" />
      <sliceName value="valueBoolean" />
      <type>
        <code value="boolean" />
      </type>
    </element>
  </differential>
</StructureDefinition>