description: This extension will appear on the root of an assembled Questionnaire and identifies the subQuestionnaires (including version) that were used as part of the assembly process. package_name: hl7.fhir.uv.sdc derivation: constraint name: AssembledFromExtension type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-assembledFrom'} index: 1 value: choices: [valueCanonical] index: 3 valueCanonical: {type: canonical, choiceOf: value, index: 4} package_version: 4.0.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-assembledFrom base: http://hl7.org/fhir/StructureDefinition/Extension version: 4.0.0-ballot