{
  "resourceType": "StructureDefinition",
  "id": "PN219",
  "url": "https://example.org/fhir/StructureDefinition/ethnic-pn-219",
  "name": "EthnicPN219",
  "title": "EthnicPN219",
  "status": "active",
  "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.url",
        "path": "Extension.url",
        "fixedUri": "https://example.org/fhir/StructureDefinition/ethnic-pn-219"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "binding": {
          "strength": "required",
          "valueSet": "https://fhir.pilot.mhn.asia/ValueSet/pn-219-ethnic"
        }
      }
    ]
  }
}