description: Provides a computable unit of measure associated with numeric questions to support subsequent computation on responses. This is for use on items of type integer and decimal, and it's purpose is to support converting the integer or decimal answer into a Quantity when extracting the data into a resource.
package_name: hl7.fhir.r4.core
derivation: constraint
name: unit
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/questionnaire-unit'}
    index: 1
  value:
    choices: [valueCoding]
    index: 3
  valueCoding: {type: Coding, choiceOf: value, index: 4}
package_version: 4.0.1
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/questionnaire-unit
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 4.0.1
required: [valueCoding, value]