description: A version string indicating the currency/validity of an identifier package_name: hl7.fhir.ca.baseline derivation: constraint name: ExtensionIdentifierVersion type: Extension elements: url: pattern: {type: Uri, value: 'http://hl7.org/fhir/ca/baseline/StructureDefinition/ext-identifierversion'} index: 0 valueString: {mustSupport: true, index: 1} package_version: 1.1.6-pre class: extension kind: complex-type url: http://hl7.org/fhir/ca/baseline/StructureDefinition/ext-identifierversion base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.3.0 required: [valueString]