<Patient xmlns="http://hl7.org/fhir">
  <contained>
    <Patient>
      <id />
      <managingOrganization>
        <reference value="Organization/hl7" />
      </managingOrganization>
    </Patient>
  </contained>
  <identifier>
    <use />
  </identifier>
  <!-- before active -->
  <active value="" />
  <!-- before gender -->
  <gender value="male">
    <extension url="http://example.org/StructureDefinition/real-gender">
      <valueCode value="metrosexual" />
    </extension>
    <!-- after last child -->
  </gender>
  <!-- after gender/before contact -->
  <contact>
    <!-- first child -->
    <relationship>
      <coding></coding>
    </relationship>
    <!-- after last child -->
  </contact>
</Patient>
<!-- Last comment -->