description: Identifies the units of measure in which the element should be captured or expressed.
package_name: hl7.fhir.core
derivation: constraint
name: Units to use for measured value
type: Extension
elements:
  extension:
    index: 0
    slicing:
      slices:
        extension:
          match: {}
          schema: {index: 0}
          max: 0
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/elementdefinition-allowedUnits'}
    index: 1
  value:
    choices: [valueCodeableConcept, valueReference]
    index: 3
  valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 4}
  valueReference:
    type: Reference
    choiceOf: value
    refers: ['http://hl7.org/fhir/StructureDefinition/ValueSet']
    index: 5
package_version: 1.8.0
extensions:
  extension: {url: null, max: 0, index: 0}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/elementdefinition-allowedUnits
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null
required: [valueReference, value, valueCodeableConcept]