---
title: identifier
framework: dockkit
role: symbol
role_heading: Instance Property
path: dockkit/dockaccessory/observation/identifier
---

# identifier

A unique identifier representing the subject in the frame.

## Declaration

```swift
let identifier: Int
```

## See Also

### Getting properties

- [faceYawAngle](dockkit/dockaccessory/observation/faceyawangle.md)
- [rect](dockkit/dockaccessory/observation/rect.md)
- [type](dockkit/dockaccessory/observation/type.md)