{
  "resourceType": "StructureDefinition",
  "url": "https://fhir.nhs.uk/StructureDefinition/NHSDigital-Observation-COVID19",
  "name": "NHSDigitalObservationCOVID19",
  "status": "draft",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "Observation",
  "baseDefinition": "https://fhir.nhs.uk/StructureDefinition/NHSDigital-Observation",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Observation.category:COVID-TestPillar",
        "path": "Observation.category",
        "sliceName": "COVID-TestPillar",
        "min": 1
      },
      {
        "id": "Observation.code.coding:snomedCT",
        "path": "Observation.code.coding",
        "sliceName": "snomedCT",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Observation.subject.identifier",
        "path": "Observation.subject.identifier",
        "min": 1
      }
    ]
  }
}