description: If true, marks that this element is a choice group that doesn't literally appear in the XML; it only exists to group a set of repeating of elements package_name: hl7.fhir.uv.tools.r5 derivation: constraint name: XMLChoiceGroup type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/tools/StructureDefinition/xml-choice-group'} index: 1 value: choices: [valueBoolean] index: 3 valueBoolean: {type: boolean, choiceOf: value, index: 4} package_version: 0.4.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/tools/StructureDefinition/xml-choice-group base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.4.0 required: [value, valueBoolean]