<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="parent-phpid" />
  <url value="http://umcterminologies.org/StructureDefinition/parent-phpid" />
  <name value="parent-phpid" />
  <title value="Parent PhPId" />
  <status value="active" />
  <experimental value="false" />
  <publisher value="Uppsala Monitoring Centre" />
  <description value="Reference to the parent PhPId of a PhPId" />
  <copyright value="Uppsala Monitoring Centre" />
  <fhirVersion value="5.0" />
  <kind value="resource" />
  <abstract value="true" />
  <context>
    <type value="element" />
    <expression value="AdministrableProductDefinition" />
  </context>
  <type value="Extension" />
  <differential>
    <element>
      <path value="Extension.value[x]" />
      <short value="Reference to the parent PhPId of a PhPId" />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="Reference" />
      </type>
    </element>
    <element>
      <path value="Extension.value[x].system" />
      <short value="Reference to the parent PhPId of a PhPId" />
      <min value="1" />
      <max value="1" />
      <fixedUri value="http://poc.umcterminologies.org/phpid" />
    </element>
    <element>
      <path value="Extension.value[x].code" />
      <min value="1" />
      <max value="1" />
    </element>
  </differential>
</StructureDefinition>