<status value="active" /> <experimental value="false" /> <description value="A dateTime constrained to just a year" /> <fhirVersion value="5.0.0" /> <mapping> <identity value="BPCS" /> <name value="Internal BPCS API" /> </mapping> <kind value="primitive-type" /> <abstract value="false" /> <type value="dateTime" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/dateTime" /> <derivation value="constraint" /> <differential> <element id="dateTime"> <path value="dateTime" /> <maxLength value="4" /> </element> </differential> </StructureDefinition>