description: A unit that the user may choose when providing a quantity value. package_name: hl7.fhir.core derivation: constraint name: unitOption type: Extension elements: extension: {index: 0} url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/questionnaire-unitOption'} index: 1 valueCoding: {type: Coding, index: 2} package_version: 3.5.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/questionnaire-unitOption base: http://hl7.org/fhir/StructureDefinition/Extension version: null