description: Additional channel types not defined before FHIR R5. package_name: hl7.fhir.uv.subscriptions-backport derivation: constraint name: BackportChannelType type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-channel-type'} index: 1 value: short: Extended channel type for notifications choices: [valueCoding] index: 3 valueCoding: {type: Coding, short: Extended channel type for notifications, choiceOf: value, index: 4} package_version: 1.1.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-channel-type base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.1.0