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# NSPersistentStoreUbiquitousTransitionTypeKey

```
let NSPersistentStoreUbiquitousTransitionTypeKey: String
```

## Description

In the <doc://com.apple.documentation/documentation/Foundation/NSNotification/Name-swift.struct/NSPersistentStoreCoordinatorStoresWillChange> and <doc://com.apple.documentation/documentation/Foundation/NSNotification/Name-swift.struct/NSPersistentStoreCoordinatorStoresDidChange> userInfo dictionaries, this identifies the type of event. The corresponding value is one of the [`NSPersistentStoreUbiquitousTransitionType`](/documentation/CoreData/NSPersistentStoreUbiquitousTransitionType) enum values as an `NSNumber` object.

---

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