description: This cross-version extension represents ImplementationGuide.definition.resource.fhirVersion from http://hl7.org/fhir/StructureDefinition/ImplementationGuide|4.3.0 for use in FHIR R4. package_name: hl7.fhir.uv.xver-r4b.r4 derivation: constraint name: ext_R4B_ImplementationGuide_de_re_fhirVersion type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Versions this applies to (if different to IG) choices: [valueCode] index: 1 valueCode: base: {path: 'Extension.value[x]'} type: code short: Versions this applies to (if different to IG) choiceOf: value index: 2 url: pattern: {type: uri, value: 'http://hl7.org/fhir/4.3/StructureDefinition/extension-ImplementationGuide.definition.resource.fhirVersion'} type: uri index: 3 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/4.3/StructureDefinition/extension-ImplementationGuide.definition.resource.fhirVersion base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]