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