<status value="active" /> <description value="Extension carrying the source-system criticality for AllergyIntolerance.criticality." /> <fhirVersion value="5.0.0" /> <kind value="complex-type" /> <abstract value="false" /> <context> <type value="element" /> <expression value="AllergyIntolerance.criticality" /> </context> <type value="Extension" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" /> <derivation value="constraint" /> <differential> <element id="Extension.extension"> <path value="Extension.extension" /> <max value="0" /> </element> <element id="Extension.url"> <path value="Extension.url" /> <fixedUri value="https://fhir.synapxe.sg/StructureDefinition/ext-criticality" /> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]" /> <min value="1" /> <type> <code value="CodeableConcept" /> </type> <binding> <strength value="preferred" /> <valueSet value="https://fhir.synapxe.sg/ValueSet/allergy-intolerance-criticality" /> </binding> </element> </differential> </StructureDefinition>