{
  "resourceType": "StructureDefinition",
  "id": "Observation",
  "url": "https://fhir.centraxx.de/StructureDefinition/MetastasisNaturalIdentifier",
  "version": "2025.4.0",
  "name": "MetastasisNaturalIdentifier",
  "status": "active",
  "publisher": "Kairos an IQVIA business",
  "description": "Represents a HDRP Metastasis Natural Identifier. Metastasis is resolved by XMLID(Observation.identifier)",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "Observation",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Observation",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Observation.identifier",
        "path": "Observation.identifier",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "system"
            }
          ],
          "rules": "closed"
        },
        "min": 0,
        "max": "1",
        "mustSupport": true
      },
      {
        "id": "Observation.identifier:xmlId",
        "path": "Observation.identifier",
        "sliceName": "xmlId",
        "min": 0,
        "max": "1",
        "mustSupport": true
      },
      {
        "id": "Observation.identifier:xmlId.system",
        "path": "Observation.identifier.system",
        "min": 1,
        "max": "1",
        "fixedString": "https://fhir.centraxx.de/system/metastasis/xmlId",
        "mustSupport": true
      },
      {
        "id": "Observation.identifier:xmlId.value",
        "path": "Observation.identifier.value",
        "min": 1,
        "max": "1",
        "mustSupport": true
      }
    ]
  }
}