http://hl7.org/fhir/StructureDefinition/url|4.0.1

{description: 'Base StructureDefinition for url type: A URI that is a literal reference', derivation: specialization, name: url, type: url, class: primitive-type, kind: primitive-type, url: 'http://hl7.org/fhir/StructureDefinition/url', base: 'http://hl7.org/fhir/StructureDefinition/uri', version: 4.0.1}