description: This cross-version extension represents DeviceRequest.doNotPerform from http://hl7.org/fhir/StructureDefinition/DeviceRequest|5.0.0 for use in FHIR R4B. package_name: hl7.fhir.uv.xver derivation: constraint name: ext_R5_DeviceRequest_doNotPerform type: Extension elements: value: base: {path: 'Extension.value[x]'} short: True if the request is to stop or not to start using the device choices: [valueBoolean] index: 1 valueBoolean: base: {path: 'Extension.value[x]'} type: boolean short: True if the request is to stop or not to start using the device choiceOf: value index: 2 url: pattern: {type: Uri, value: 'http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform'} index: 3 package_version: r5.r4b-0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]