# specialize Implements queries used for data binding. ## Overview The `specialize` element is used to modify an existing element based on a data query. Combine the query with parameters contained in your JSON data to determine how to modify an existing element. Here’s an example that changes the text for a button if the user has started watching a media item, but hasn’t finished it. ```xml Resume ``` ### Subelements of specialize The `specialize` element can contain any element. ### Elements that Use specialize - [rules](/documentation/TVML/rules) ## Topics ### Valid TVML Attributes [binding](/documentation/TVML/binding) Associates information in a data item with an element. [prototype](/documentation/TVML/prototype) Associates a data item type with an element. [theme](/documentation/TVML/theme) Sets the color scheme for an element. --- 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)