# ParameterSet A reference to general-purpose entity parameters for animations. ``` struct ParameterSet ``` ## Overview Subscript this structure to access a particular property by name. The return value is [`BindableValue`](/documentation/RealityKit/BindableValue) ``, where `T` is one of the adopting [`BindableData`](/documentation/RealityKit/BindableData) types. As a reference, this structure doesn’t exhibit copy-on-write behavior. ## Topics ### Accessing a parameter by name [`subscript(String, T.Type) -> BindableValue?`](/documentation/RealityKit/ParameterSet/subscript(_:_:)) Provides a bindable value for the given name. --- 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)