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