---
title: identifier
framework: avkit
role: symbol
role_heading: Instance Property
path: avkit/avinterfacetimelinesegment/identifier
---

# identifier

Optional external identifier for tracking or analytics purposes. May correspond to advertisement IDs, chapter markers, or other external systems.

## Declaration

```swift
var identifier: String? { get }
```

## See Also

### Inspecting the segment

- [timeRange](avkit/avinterfacetimelinesegment/timerange.md)
- [isAuxiliaryContent](avkit/avinterfacetimelinesegment/isauxiliarycontent.md)
- [isMarked](avkit/avinterfacetimelinesegment/ismarked.md)
- [requiresLinearPlayback](avkit/avinterfacetimelinesegment/requireslinearplayback.md)