# TemporalSegmentIdentifier Uniquely identifiers a segment of a temporal sequence. ``` struct TemporalSegmentIdentifier ``` ## Topics ### Creating a segment identifier [`init(source: String, range: Range, timescale: Int)`](/documentation/CreateMLComponents/TemporalSegmentIdentifier/init(source:range:timescale:)) Creates a temporal-segment identifier. ### Getting the properties [`var durationInSeconds: TimeInterval`](/documentation/CreateMLComponents/TemporalSegmentIdentifier/durationInSeconds) The segment duration in seconds. [`var range: Range`](/documentation/CreateMLComponents/TemporalSegmentIdentifier/range) The segment’s timestamp range. [`var rangeInSeconds: Range`](/documentation/CreateMLComponents/TemporalSegmentIdentifier/rangeInSeconds) The time range in seconds. [`var source: String`](/documentation/CreateMLComponents/TemporalSegmentIdentifier/source) The segment source. For files use the full path or URL of the file. [`var timescale: Int`](/documentation/CreateMLComponents/TemporalSegmentIdentifier/timescale) The identifier’s timescale is the number of uniquely identifiable timestamps in a second. ## Relationships ### Conforms To [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Sendable`](/documentation/Swift/Sendable) [`Escapable`](/documentation/Swift/Escapable) [`Encodable`](/documentation/Swift/Encodable) [`Hashable`](/documentation/Swift/Hashable) [`Equatable`](/documentation/Swift/Equatable) [`Copyable`](/documentation/Swift/Copyable) [`Decodable`](/documentation/Swift/Decodable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)