description: This cross-version extension represents DeviceUseStatement.whenUsed from http://hl7.org/fhir/StructureDefinition/DeviceUseStatement|1.0.2 for use in FHIR R4B.
package_name: hl7.fhir.uv.xver
derivation: constraint
name: Ext_R2_DeviceUseStatement_whenUsed
type: Extension
elements:
  url:
    base: {max: '1', min: 1, path: Extension.url}
    pattern: {type: Uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-DeviceUseStatement.whenUsed'}
    index: 0
  value:
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    short: The time period over which the device was used.
    choices: [valuePeriod]
    index: 2
  valuePeriod:
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    type: Period
    short: The time period over which the device was used.
    choiceOf: value
    index: 3
package_version: r2.r4b-0.0.1-snapshot-2
class: extension
kind: complex-type
url: http://hl7.org/fhir/1.0/StructureDefinition/extension-DeviceUseStatement.whenUsed
base: http://hl7.org/fhir/StructureDefinition/Extension|4.3.0
version: 0.0.1-snapshot-2
required: [url]