{
  "resourceType": "StructureDefinition",
  "id": "8cf25898-9b2b-4772-a5bd-18fa6bc8f08f",
  "meta": {
    "versionId": "2",
    "lastUpdated": "2016-12-13T17:35:12.311+00:00"
  },
  "url": "http://example.org/fhir/StructureDefinition/ethnicity",
  "name": "ethnicity",
  "status": "draft",
  "date": "2016-12-13T17:22:48+00:00",
  "kind": "datatype",
  "constrainedType": "Extension",
  "abstract": false,
  "contextType": "resource",
  "context": [
    "Patient"
  ],
  "base": "http://hl7.org/fhir/StructureDefinition/Extension",
  "differential": {
    "element": [
      {
        "path": "Extension"
      },
      {
        "path": "Extension.url",
        "fixedUri": "http://example.org/fhir/StructureDefinition/ethnicity"
      },
      {
        "path": "Extension.valueString",
        "type": [
          {
            "code": "string"
          }
        ]
      }
    ]
  }
}