{
  "resourceType": "StructureDefinition",
  "id": "spark1623",
  "meta": {
    "versionId": "spark1966",
    "lastUpdated": "2015-11-17T17:25:15.416+00:00"
  },
  "url": "http://example.org/fhir/StructureDefinition/referral",
  "name": "Referral extension",
  "status": "draft",
  "date": "2015-09-22T10:02:49+00:00",
  "description": "A complex extension to represent a referral",
  "fhirVersion": "1.0.1",
  "kind": "datatype",
  "constrainedType": "Extension",
  "abstract": false,
  "contextType": "resource",
  "context": [
    "Basic"
  ],
  "base": "http://hl7.org/fhir/StructureDefinition/Extension",
  "differential": {
    "element": [
      {
        "path": "Extension",
        "min": 1,
        "max": "1"
      },
      {
        "path": "Extension.extension",
        "name": "requestor"
      },
      {
        "path": "Extension.extension.url",
        "fixedUri": "requestor"
      },
      {
        "path": "Extension.extension.value[x]",
        "min": 1,
        "max": "1",
        "type": [
          {
            "code": "Reference",
            "profile": [
              "http://hl7.org/fhir/StructureDefinition/Practitioner"
            ]
          }
        ]
      },
      {
        "path": "Extension.extension",
        "name": "service"
      },
      {
        "path": "Extension.extension.url",
        "fixedUri": "service"
      },
      {
        "path": "Extension.extension.value[x]",
        "min": 1,
        "max": "1",
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "binding": {
          "strength": "preferred",
          "valueSetReference": {
            "reference": "http://hl7.org/fhir/ValueSet/all-of-snomed"
          }
        }
      },
      {
        "path": "Extension.url",
        "fixedUri": "http://example.org/fhir/StructureDefinition/referral"
      },
      {
        "path": "Extension.value[x]",
        "min": 0,
        "max": "0"
      }
    ]
  }
}