http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-unitOpen|4.0.0-ballot
Indicates whether the list of supported units (conveyed in other extensions) are the exhaustive list from which the user must choose or whether they're able to select alternate codes or specify a string.
description: Indicates whether the list of supported units (conveyed in other extensions) are the exhaustive list from which the user must choose or whether they're able to select alternate codes or specify a string. derivation: constraint name: UnitOpen type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-unitOpen'} index: 1 value: choices: [] index: 3 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-unitOpen base: http://hl7.org/fhir/StructureDefinition/Extension version: 4.0.0-ballot required: [value]