{
  "resourceType": "StructureDefinition",
  "id": "itcc-core-Observation-DiseaseExtent",
  "url": "https://www.itcc-consortium.org/fhir/StructureDefinition/itcc-core-Observation-DiseaseExtent",
  "name": "itcc-core-Observation-DiseaseExtent",
  "title": "ITCC Observation Disease Extent",
  "status": "active",
  "date": "2026-02-27",
  "publisher": "ITCC Consortium",
  "description": "Observation profile aligned to ITCC mapping for disease extent (main extent + optional detail locations), linked to a Condition via focus.",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "Observation",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Observation",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Observation.id",
        "path": "Observation.id",
        "min": 1,
        "max": "1",
        "mustSupport": true
      },
      {
        "id": "Observation.subject",
        "path": "Observation.subject",
        "min": 1,
        "max": "1",
        "mustSupport": true
      },
      {
        "id": "Observation.focus",
        "path": "Observation.focus",
        "min": 1,
        "max": "1",
        "mustSupport": true
      },
      {
        "id": "Observation.valueCodeableConcept",
        "path": "Observation.valueCodeableConcept",
        "min": 1,
        "max": "1",
        "mustSupport": true,
        "binding": {
          "strength": "required",
          "valueSet": "https://www.itcc-consortium.org/fhir/ValueSet/itcc-core-disease-extent-vs"
        }
      },
      {
        "id": "Observation.component",
        "path": "Observation.component",
        "min": 0,
        "max": "*",
        "mustSupport": true
      },
      {
        "id": "Observation.component.valueCodeableConcept",
        "path": "Observation.component.valueCodeableConcept",
        "min": 0,
        "max": "1",
        "mustSupport": true,
        "binding": {
          "strength": "required",
          "valueSet": "https://www.itcc-consortium.org/fhir/ValueSet/itcc-core-disease-extent-detail-vs"
        }
      }
    ]
  }
}