---
title: sessionIdentifier
framework: arkit
role: symbol
role_heading: Instance Property
path: arkit/aranchor/sessionidentifier
---

# sessionIdentifier

The unique identifier of the session that owns this anchor.

## Declaration

```swift
var sessionIdentifier: UUID? { get }
```

## Discussion

Discussion ARKit sets this property when a user first adds an anchor to a session. In multiuser experiences, use this ID to identify the user that created the anchor.

## See Also

### Tracking Anchors

- [identifier](arkit/aranchor/identifier.md)
- [transform](arkit/aranchor/transform.md)