# CKRecordValue The protocol that provides strong type-checking for objects that the CloudKit framework stores on the server. ``` @protocol CKRecordValue ``` ## Overview CloudKit supports the following classes that adopt this protocol: - - - - - - [`CKRecord.Reference`](/documentation/CloudKit/CKRecord/Reference) - [`CKAsset`](/documentation/CloudKit/CKAsset) - Don’t adopt this protocol in your custom classes. CloudKit doesn’t support writing custom data types to the server. Attempting to do so results in an error. --- 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)