---
title: Notification keys
framework: coredata
role: collectionGroup
role_heading: API Collection
path: coredata/notification-keys
---

# Notification keys

The keys you use to retrieve values from a notification’s user info dictionary.

## Topics

### Constants

- [NSAddedPersistentStoresKey](coredata/nsaddedpersistentstoreskey.md)
- [NSRemovedPersistentStoresKey](coredata/nsremovedpersistentstoreskey.md)
- [NSUUIDChangedPersistentStoresKey](coredata/nsuuidchangedpersistentstoreskey.md)
- [NSPersistentStoreConnectionPoolMaxSizeKey](coredata/nspersistentstoreconnectionpoolmaxsizekey.md)
- [NSPersistentStoreSaveConflictsErrorKey](coredata/nspersistentstoresaveconflictserrorkey.md)
- [NSPersistentStoreUbiquitousTransitionTypeKey](coredata/nspersistentstoreubiquitoustransitiontypekey.md)

## See Also

### Responding to changes of the coordinator’s registered stores

- [NSPersistentStoreCoordinatorStoresWillChange](foundation/nsnotification/name-swift.struct/nspersistentstorecoordinatorstoreswillchange.md)
- [NSPersistentStoreCoordinatorStoresDidChange](foundation/nsnotification/name-swift.struct/nspersistentstorecoordinatorstoresdidchange.md)
- [NSPersistentStoreCoordinatorWillRemoveStore](foundation/nsnotification/name-swift.struct/nspersistentstorecoordinatorwillremovestore.md)