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# ARSession.CollaborationData

An object that holds information that a user has collected about the physical environment.

```
class CollaborationData
```

## Overview

To create a multiuser AR experience, you enable collaboration on a world tracking session. ARKit regularly outputs [`ARSession.CollaborationData`](/documentation/ARKit/ARSession/CollaborationData) that users share with each other, which enables everyone to view the same virtual content from their own perspective. For more information, see [`isCollaborationEnabled`](/documentation/ARKit/ARWorldTrackingConfiguration/isCollaborationEnabled).

## Topics

### Observing Priority

[`priority`](/documentation/ARKit/ARSession/CollaborationData/priority-swift.property)

A property that gives you a hint about how to send a given data instance over the network.

[`ARSession.CollaborationData.Priority`](/documentation/ARKit/ARSession/CollaborationData/Priority-swift.enum)

Options that help you choose the appropriate network protocol or settings for a given data instance.


---

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