{
  "resourceType": "StructureDefinition",
  "url": "https://example.org/fhir/StructureDefinition/headacheType",
  "name": "headacheType",
  "status": "draft",
  "fhirVersion": "3.0.2",
  "kind": "resource",
  "abstract": false,
  "type": "Observation",
  "baseDefinition": "https://example.org/fhir/StructureDefinition/MyObservation",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Observation.code.coding.code",
        "path": "Observation.code.coding.code",
        "fixedCode": "89196-0"
      },
      {
        "id": "Observation.code.text",
        "path": "Observation.code.text",
        "fixedString": "Kopfschmerztyp"
      },
      {
        "id": "Observation.value[x]",
        "path": "Observation.value[x]",
        "min": 1,
        "type": [
          {
            "code": "string"
          },
          {
            "code": "Period"
          }
        ]
      },
      {
        "id": "Observation.interpretation",
        "path": "Observation.interpretation",
        "min": 1
      },
      {
        "id": "Observation.interpretation.coding.code",
        "path": "Observation.interpretation.coding.code",
        "fixedCode": "89193-7"
      },
      {
        "id": "Observation.interpretation.text",
        "path": "Observation.interpretation.text",
        "fixedString": "quicktest result: \"Migraine\" or \"tension headache\""
      }
    ]
  }
}