{
  "resourceType": "StructureDefinition",
  "id": "hospital-patient",
  "url": "http://omi.de/fhir/registry/StructureDefinition/hospital-patient",
  "name": "HospitalPatient",
  "title": "Hospital Patient",
  "status": "active",
  "description": "A patient with a hospital-specific identifier that must contain 'HOSP'.",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "Patient",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Patient",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Patient.identifier.value",
        "path": "Patient.identifier.value",
        "constraint": [
          {
            "key": "id-1",
            "severity": "error",
            "human": "Identifier must contain 'HOSP'",
            "expression": "value.contains('HOSP')",
            "source": "http://omi.de/fhir/registry/StructureDefinition/hospital-patient"
          }
        ]
      }
    ]
  }
}