description: This cross-version extension represents Questionnaire.item.option.extension from http://hl7.org/fhir/StructureDefinition/Questionnaire|3.0.2 for use in FHIR R4B. package_name: rs/hl7.fhir.uv.xver derivation: constraint name: ext_R3_Questionnaire_it_op_extension type: Extension elements: url: pattern: {type: uri, value: 'http://hl7.org/fhir/3.0/StructureDefinition/extension-Questionnaire.item.option.extension'} type: uri index: 0 package_version: r3.r4b-0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/3.0/StructureDefinition/extension-Questionnaire.item.option.extension base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]