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# Attribute Keys

Attributes of a composition.

## Topics

### Constants

[`QCCompositionAttributeNameKey`](/documentation/Quartz/QCCompositionAttributeNameKey)

The key for the composition name. The associated value is an `NSString` object.

[`QCCompositionAttributeDescriptionKey`](/documentation/Quartz/QCCompositionAttributeDescriptionKey)

The key for the composition description. The associated value is an `NSString` object.

[`QCCompositionAttributeCopyrightKey`](/documentation/Quartz/QCCompositionAttributeCopyrightKey)

The key for composition copyright information. The associated value is an `NSString` object.

[`QCCompositionAttributeBuiltInKey`](/documentation/Quartz/QCCompositionAttributeBuiltInKey)

The key for the composition origin.

[`QCCompositionAttributeHasConsumersKey`](/documentation/Quartz/QCCompositionAttributeHasConsumersKey)

The key for a composition that has consumer patches.

[`QCCompositionAttributeCategoryKey`](/documentation/Quartz/QCCompositionAttributeCategoryKey)

A key representing a composition category.


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