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  "title" : "identifier"
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# identifier

A structure that uniquely identifies the notification.

```
let identifier: AccessoryNotification.Identifier
```

## Discussion

This structure combines the source app’s bundle identifier ([`sourceIdentifier`](/documentation/AccessoryNotifications/AccessoryNotification/Identifier-swift.struct/sourceIdentifier)) with an app-provided notification identifier ([`notificationIdentifier`](/documentation/AccessoryNotifications/AccessoryNotification/Identifier-swift.struct/notificationIdentifier)).

---

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