<status value="active" /> <experimental value="false" /> <description value="A reference that points to another RESTful resource" /> <fhirVersion value="5.0.0" /> <mapping> <identity value="BPCS" /> <name value="Internal BPCS API" /> </mapping> <kind value="complex-type" /> <abstract value="false" /> <type value="Reference" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Reference" /> <derivation value="constraint" /> <differential> <element id="Reference.reference"> <path value="Reference.reference" /> <min value="1" /> <mustSupport value="true" /> </element> </differential> </StructureDefinition>