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  "documentType" : "symbol",
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  "identifier" : "/documentation/ARKit/ARSession/CollaborationData/priority-swift.property",
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  "title" : "priority"
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# priority

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

```
var priority: ARSession.CollaborationData.Priority { get }
```

## Discussion

If you have reliability options in the network protocol you choose to transport [`ARSession.CollaborationData`](/documentation/ARKit/ARSession/CollaborationData) among peers, the [`priority`](/documentation/ARKit/ARSession/CollaborationData/priority-swift.property) property gives you a hint about which reliability option to choose for a given collaboration data instance. For example, if you use MultipeerConnectivity to send collaboration data over the network, choose <doc://com.apple.documentation/documentation/MultipeerConnectivity/MCSessionSendDataMode/reliable> when calling <doc://com.apple.documentation/documentation/MultipeerConnectivity/MCSession/send(_:toPeers:with:)> after ARKit gives you a collaboration data instance with priority [`ARSession.CollaborationData.Priority.critical`](/documentation/ARKit/ARSession/CollaborationData/Priority-swift.enum/critical).

---

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