<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://fhir.nhs.uk/StructureDefinition/NHSDigital-DocumentReference-NRL" />
  <name value="NHSDigitalDocumentReferenceNRL" />
  <status value="draft" />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="DocumentReference" />
  <baseDefinition value="https://fhir.nhs.uk/StructureDefinition/NHSDigital-DocumentReference" />
  <derivation value="constraint" />
  <differential>
    <element id="DocumentReference.type">
      <path value="DocumentReference.type" />
      <min value="1" />
      <binding>
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="DocumentC80Type" />
        </extension>
        <strength value="required" />
        <valueSet value="https://fhir.nhs.uk/ValueSet/Document-Type" />
      </binding>
    </element>
  </differential>
</StructureDefinition>