<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://fhir.nhs.uk/StructureDefinition/NHSDigital-Identifier" />
  <name value="NHSDigitalIdentifier" />
  <status value="draft" />
  <fhirVersion value="4.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <type value="Identifier" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Identifier" />
  <derivation value="constraint" />
  <differential>
    <element id="Identifier.type">
      <path value="Identifier.type" />
      <binding>
        <strength value="required" />
        <valueSet value="https://fhir.nhs.uk/ValueSet/NHSDigital-IdentifierType" />
      </binding>
    </element>
  </differential>
</StructureDefinition>