{
  "resourceType": "StructureDefinition",
  "id": "itcc-core-Specimen-Sample",
  "url": "https://www.itcc-consortium.org/fhir/StructureDefinition/itcc-core-Specimen-Sample",
  "name": "itcc-core-Specimen-Sample",
  "title": "ITCC Specimen Sample",
  "status": "active",
  "date": "2026-02-27",
  "publisher": "ITCC Consortium",
  "description": "Specimen profile aligned to ITCC mapping for Sample, including identifier, type, subject reference, and age at extraction (months) via extension.",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "Specimen",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Specimen",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Specimen.id",
        "path": "Specimen.id",
        "min": 1,
        "max": "1",
        "mustSupport": true
      },
      {
        "id": "Specimen.identifier",
        "path": "Specimen.identifier",
        "min": 1,
        "max": "1",
        "mustSupport": true
      },
      {
        "id": "Specimen.subject",
        "path": "Specimen.subject",
        "min": 1,
        "max": "1",
        "mustSupport": true
      },
      {
        "id": "Specimen.type",
        "path": "Specimen.type",
        "min": 1,
        "max": "1",
        "mustSupport": true,
        "binding": {
          "strength": "required",
          "valueSet": "https://www.itcc-consortium.org/fhir/ValueSet/itcc-core-specimen-type-vs"
        }
      },
      {
        "id": "Specimen.extension",
        "path": "Specimen.extension",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Specimen.extension:ageAtExtraction",
        "path": "Specimen.extension",
        "sliceName": "ageAtExtraction",
        "min": 1,
        "max": "1",
        "type": [
          {
            "code": "Extension",
            "profile": [
              "https://www.itcc-consortium.org/fhir/StructureDefinition/itcc-core-specimen-age-ext"
            ]
          }
        ]
      }
    ]
  }
}