# Core Data Constants Keys to use with persistent stores and notifications from Core Data. ## Topics ### Core Data Versions [`NSCoreDataVersionNumber`](/documentation/CoreData/NSCoreDataVersionNumber) The version of Core Data available in the current process. [`NSCoreDataVersionNumber10_10`](/documentation/CoreData/NSCoreDataVersionNumber10_10) The Core Data version number released with macOS 10.10. [`NSCoreDataVersionNumber10_10_2`](/documentation/CoreData/NSCoreDataVersionNumber10_10_2) The Core Data version number released with macOS 10.10.2. [`NSCoreDataVersionNumber10_10_3`](/documentation/CoreData/NSCoreDataVersionNumber10_10_3) The Core Data version number released with macOS 10.10.3. [`NSCoreDataVersionNumber10_11`](/documentation/CoreData/NSCoreDataVersionNumber10_11) The Core Data version number released with macOS 10.11. [`NSCoreDataVersionNumber10_11_3`](/documentation/CoreData/NSCoreDataVersionNumber10_11_3) The Core Data version number released with macOS 10.11.3. [`NSCoreDataVersionNumber10_4`](/documentation/CoreData/NSCoreDataVersionNumber10_4) The Core Data version number released with macOS 10.4. [`NSCoreDataVersionNumber10_4_3`](/documentation/CoreData/NSCoreDataVersionNumber10_4_3) The Core Data version number released with macOS 10.4.3. [`NSCoreDataVersionNumber10_5`](/documentation/CoreData/NSCoreDataVersionNumber10_5) The Core Data version number released with macOS 10.5. [`NSCoreDataVersionNumber10_5_3`](/documentation/CoreData/NSCoreDataVersionNumber10_5_3) The Core Data version number released with macOS 10.5.3. [`NSCoreDataVersionNumber10_6`](/documentation/CoreData/NSCoreDataVersionNumber10_6) The Core Data version number released with macOS 10.6. [`NSCoreDataVersionNumber10_6_2`](/documentation/CoreData/NSCoreDataVersionNumber10_6_2) The Core Data version number released with macOS 10.6.2. [`NSCoreDataVersionNumber10_6_3`](/documentation/CoreData/NSCoreDataVersionNumber10_6_3) The Core Data version number released with macOS 10.6.3. [`NSCoreDataVersionNumber10_7`](/documentation/CoreData/NSCoreDataVersionNumber10_7) The Core Data version number released with macOS 10.7. [`NSCoreDataVersionNumber10_7_2`](/documentation/CoreData/NSCoreDataVersionNumber10_7_2) The Core Data version number released with macOS 10.7.2. [`NSCoreDataVersionNumber10_7_3`](/documentation/CoreData/NSCoreDataVersionNumber10_7_3) The Core Data version number released with macOS 10.7.3. [`NSCoreDataVersionNumber10_7_4`](/documentation/CoreData/NSCoreDataVersionNumber10_7_4) The Core Data version number released with macOS 10.7.4. [`NSCoreDataVersionNumber10_8`](/documentation/CoreData/NSCoreDataVersionNumber10_8) The Core Data version number released with macOS 10.8. [`NSCoreDataVersionNumber10_8_2`](/documentation/CoreData/NSCoreDataVersionNumber10_8_2) The Core Data version number released with macOS 10.8.2. [`NSCoreDataVersionNumber10_9`](/documentation/CoreData/NSCoreDataVersionNumber10_9) The Core Data version number released with macOS 10.9. [`NSCoreDataVersionNumber10_9_2`](/documentation/CoreData/NSCoreDataVersionNumber10_9_2) The Core Data version number released with macOS 10.9.2. [`NSCoreDataVersionNumber10_9_3`](/documentation/CoreData/NSCoreDataVersionNumber10_9_3) The Core Data version number released with macOS 10.9.3. [`NSCoreDataVersionNumber_iPhoneOS_3_0`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_3_0) The Core Data version number released with iOS 3. [`NSCoreDataVersionNumber_iPhoneOS_3_1`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_3_1) The Core Data version number released with iOS 3.1. [`NSCoreDataVersionNumber_iPhoneOS_3_2`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_3_2) The Core Data version number released with iOS 3.2. [`NSCoreDataVersionNumber_iPhoneOS_4_0`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_4_0) The Core Data version number released with iOS 4. [`NSCoreDataVersionNumber_iPhoneOS_4_1`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_4_1) The Core Data version number released with iOS 4.1. [`NSCoreDataVersionNumber_iPhoneOS_4_2`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_4_2) The Core Data version number released with iOS 4.2. [`NSCoreDataVersionNumber_iPhoneOS_4_3`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_4_3) The Core Data version number released with iOS 4.2. [`NSCoreDataVersionNumber_iPhoneOS_5_0`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_5_0) The Core Data version number released with iOS 5. [`NSCoreDataVersionNumber_iPhoneOS_5_1`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_5_1) The Core Data version number released with iOS 5.1. [`NSCoreDataVersionNumber_iPhoneOS_6_0`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_6_0) The Core Data version number released with iOS 6. [`NSCoreDataVersionNumber_iPhoneOS_6_1`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_6_1) The Core Data version number released with iOS 6.1. [`NSCoreDataVersionNumber_iPhoneOS_7_0`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_7_0) The Core Data version number released with iOS 7.0. [`NSCoreDataVersionNumber_iPhoneOS_7_1`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_7_1) The Core Data version number released with iOS 7.1. [`NSCoreDataVersionNumber_iPhoneOS_8_0`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_8_0) The Core Data version number released with iOS 8.0. [`NSCoreDataVersionNumber_iPhoneOS_8_3`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_8_3) The Core Data version number released with iOS 8.3. [`NSCoreDataVersionNumber_iPhoneOS_9_0`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_9_0) The Core Data version number released with iOS 9.0. [`NSCoreDataVersionNumber_iPhoneOS_9_2`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_9_2) The Core Data version number released with iOS 9.2. [`NSCoreDataVersionNumber_iPhoneOS_9_3`](/documentation/CoreData/NSCoreDataVersionNumber_iPhoneOS_9_3) The Core Data version number released with iOS 9.3. ### Errors [`NSSQLiteErrorDomain`](/documentation/CoreData/NSSQLiteErrorDomain) Domain for SQLite errors. [Validation Error Codes](/documentation/CoreData/error-codes) Error codes relating to the validation of managed objects. ### User Info Dictionary Keys [`NSAffectedObjectsErrorKey`](/documentation/CoreData/NSAffectedObjectsErrorKey) The key for objects prompting an error. [`NSAffectedStoresErrorKey`](/documentation/CoreData/NSAffectedStoresErrorKey) The key for stores prompting an error. [`NSDetailedErrorsKey`](/documentation/CoreData/NSDetailedErrorsKey) If multiple validation errors occur in one operation, they are collected in an array and added with this key to the “top-level error” of the operation. [`NSDeletedObjectIDsKey`](/documentation/CoreData/NSDeletedObjectIDsKey) A user info key to identify deleted object identifiers in notifications after saving a managed object context. [`NSInsertedObjectIDsKey`](/documentation/CoreData/NSInsertedObjectIDsKey) A user info key to identify inserted object identifiers in notifications after saving a managed object context. [`NSInvalidatedObjectIDsKey`](/documentation/CoreData/NSInvalidatedObjectIDsKey) A user info key to identify invalidated object identifiers in notifications after saving a managed object context. [`NSPersistentHistoryTokenKey`](/documentation/CoreData/NSPersistentHistoryTokenKey) A user info key to identify the history token in persistent store remote change notifications. [`NSPersistentStoreURLKey`](/documentation/CoreData/NSPersistentStoreURLKey) A user info key to identify the store URL in persistent store remote change notifications. [`NSRefreshedObjectIDsKey`](/documentation/CoreData/NSRefreshedObjectIDsKey) A user info key to identify refreshed object identifiers in notifications after saving a managed object context. [`NSUpdatedObjectIDsKey`](/documentation/CoreData/NSUpdatedObjectIDsKey) A user info key to identify updated object identifiers in notifications after saving a managed object context. ### Persistent Store Metadata Keys [`NSBinaryStoreInsecureDecodingCompatibilityOption`](/documentation/CoreData/NSBinaryStoreInsecureDecodingCompatibilityOption) A flag that indicates Core Data decodes the binary store insecurely. [`NSBinaryStoreSecureDecodingClasses`](/documentation/CoreData/NSBinaryStoreSecureDecodingClasses) An additional set of classes to use while decoding a binary store. [`NSPersistentStoreRemoteChangeNotificationPostOptionKey`](/documentation/CoreData/NSPersistentStoreRemoteChangeNotificationPostOptionKey) A key that indicates a persistent store posts a remote change notification for every write to the store, including writes by other processes. [`NSPersistentStoreModelVersionChecksumKey`](/documentation/CoreData/NSPersistentStoreModelVersionChecksumKey) ### Notifications [`NSPersistentStoreCoordinatorStoresDidChangeNotification`](/documentation/CoreData/NSPersistentStoreCoordinatorStoresDidChangeNotification) A notification that the coordinator posts after its registered stores change. [`NSPersistentStoreCoordinatorStoresWillChangeNotification`](/documentation/CoreData/NSPersistentStoreCoordinatorStoresWillChangeNotification) A notification that posts before a coordinator changes its registered stores. [`NSPersistentStoreCoordinatorWillRemoveStoreNotification`](/documentation/CoreData/NSPersistentStoreCoordinatorWillRemoveStoreNotification) A notification that posts before a coordinator removes a store. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)