<status value="draft" /> <fhirVersion value="4.0.1" /> <kind value="resource" /> <abstract value="false" /> <type value="Immunization" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Immunization" /> <derivation value="constraint" /> <differential> <element id="Immunization.vaccineCode"> <path value="Immunization.vaccineCode" /> <mustSupport value="true" /> <binding> <strength value="preferred" /> <valueSet value="http://example.org/ValueSet/fake-valueset" /> </binding> </element> </differential> </StructureDefinition>