{
  "resourceType": "StructureDefinition",
  "url": "https://fhir.nhs.uk/StructureDefinition/NHSDigital-Reference",
  "name": "NHSDigitalReference",
  "status": "draft",
  "fhirVersion": "4.0.1",
  "kind": "complex-type",
  "abstract": false,
  "type": "Reference",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Reference",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Reference.identifier",
        "path": "Reference.identifier",
        "type": [
          {
            "code": "Identifier",
            "profile": [
              "https://fhir.nhs.uk/StructureDefinition/NHSDigital-Identifier"
            ]
          }
        ]
      }
    ]
  }
}