# value(onlyIfMatching:) Retrieves a tag’s value as a specific type, if and only if it matches a category. ``` func value(onlyIfMatching category: CMTypedTag.Category) -> T? where T : Sendable ``` ## Parameters `category` The category to check if the tag contains. ## Return Value The value contained in the tag as an instance of type `T` if the category matches. Otherwise, returns `nil`. --- 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)