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# UIKit Data Types

The UIKit framework defines data types that are used in multiple places throughout the framework.

## Topics

### Data Types

[`ComponentKey`](/documentation/UIKit/UITextFormattingViewController/ComponentKey)

Predefined text formatting view controller components.

[`Highlight`](/documentation/UIKit/UITextFormattingViewController/Highlight)

Text formatting highlight state.

[`TextAlignment`](/documentation/UIKit/UITextFormattingViewController/TextAlignment)

Text formatting horizontal alignment state.

[`TextList`](/documentation/UIKit/UITextFormattingViewController/TextList)

Text formatting text list state.

[`UITextFormattingViewControllerChangeType`](/documentation/UIKit/UITextFormattingViewControllerChangeType)

Enumeration of text formatting actions.


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