{
  "resourceType": "StructureDefinition",
  "id": "patient-nation-extension",
  "url": "http://example.org/fhir/StructureDefinition/patient-nation",
  "name": "PatientNationExtension",
  "title": "Patient Nationality Extension",
  "status": "active",
  "description": "扩展Patient资源以支持民族信息记录",
  "fhirVersion": "4.0.1",
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "Patient"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "民族信息扩展",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "http://example.org/fhir/StructureDefinition/patient-nation"
      },
      {
        "id": "Extension.valueCodeableConcept",
        "path": "Extension.valueCodeableConcept",
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "binding": {
          "strength": "required",
          "valueSet": "http://example.org/fhir/ValueSet/nationcode"
        },
        "short": "民族编码",
        "min": 1,
        "max": "1"
      }
    ]
  }
}