<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="23dd87e0-045a-4f87-8596-5d1aeb6edbc3" />
  <meta>
    <lastUpdated value="2019-01-10T11:37:11.643+00:00" />
  </meta>
  <url value="http://example.org/fhir/StructureDefinition/PetName" />
  <name value="PetName" />
  <status value="draft" />
  <date value="2019-01-10T11:37:11.5499228+00:00" />
  <fhirVersion value="3.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <contextType value="resource" />
  <context value="Patient" />
  <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/PetName" />
    </element>
    <element id="Extension.value[x]:valueString">
      <path value="Extension.valueString" />
      <sliceName value="valueString" />
      <min value="1" />
      <type>
        <code value="string" />
      </type>
    </element>
  </differential>
</StructureDefinition>