<Practitioner xmlns="http://hl7.org/fhir">
  <id value="123" />
  <identifier>
    <system value="http://example.com/doctor_license_nr" />
    <value value="12345" />
  </identifier>
  <name>
    <family value="Doe" />
    <given value="Dr. John" />
    <prefix value="Dr." />
  </name>
</Practitioner>