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# session(_:didOutputCollaborationData:)

Provides information for nearby users about your perspective in the environment.

```
optional func session(_ session: ARSession, didOutputCollaborationData data: ARSession.CollaborationData)
```

## Parameters

`session`

The app’s collaborative session.

`data`

The information to share with participants.

## Discussion

The data parameter contains information about your perspective in the physical environment. When ARKit invokes this function, send the `data` object to nearby users. The users update their session with your data to gain your app’s model of the physical environment in addition to their own. For more information, see [`isCollaborationEnabled`](/documentation/ARKit/ARWorldTrackingConfiguration/isCollaborationEnabled).

For an example app that implements this callback, see [Creating a collaborative session](/documentation/ARKit/creating-a-collaborative-session).

---

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