<status value="active" /> <description value="A patient with a hospital-specific identifier that must contain 'HOSP'." /> <fhirVersion value="4.0.1" /> <kind value="resource" /> <abstract value="false" /> <type value="Patient" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Patient" /> <derivation value="constraint" /> <differential> <element id="Patient.identifier.value"> <path value="Patient.identifier.value" /> <constraint> <key value="id-1" /> <severity value="error" /> <human value="Identifier must contain 'HOSP'" /> <expression value="value.contains('HOSP')" /> <source value="http://omi.de/fhir/registry/StructureDefinition/hospital-patient" /> </constraint> </element> </differential> </StructureDefinition>