{
  "resourceType": "StructureDefinition",
  "meta": {
    "lastUpdated": "2022-02-10T10:37:50.6519766+00:00"
  },
  "url": "https://example.org/fhir/StructureDefinition/Observation1",
  "name": "NonResolvingSubjectReference",
  "status": "draft",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "Observation",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Observation",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Observation.subject",
        "path": "Observation.subject",
        "min": 1,
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "http://non-resolving/reference"
            ]
          }
        ]
      }
    ]
  }
}