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# IKImageBrowserItem Protocol

The `IKImageBrowserItem` informal protocol declares the methods that an instance of the [`IKImageBrowserView`](/documentation/Quartz/IKImageBrowserView) class uses to access the contents of its data source for a given item. Some of the methods in this protocol are needed frequently, so you should implement them efficiently.

## Topics

### Providing Required Information for an Image

  <doc://com.apple.documentation/documentation/ObjectiveC/NSObject-swift.class/imageUID()>

  <doc://com.apple.documentation/documentation/ObjectiveC/NSObject-swift.class/imageRepresentationType()>

  <doc://com.apple.documentation/documentation/ObjectiveC/NSObject-swift.class/imageRepresentation()>

### Providing Optional Information for an Image

  <doc://com.apple.documentation/documentation/ObjectiveC/NSObject-swift.class/imageVersion()>

  <doc://com.apple.documentation/documentation/ObjectiveC/NSObject-swift.class/imageTitle()>

  <doc://com.apple.documentation/documentation/ObjectiveC/NSObject-swift.class/imageSubtitle()>

### Constants

[Image Representation Types](/documentation/Quartz/image-representation-types)

Representation types for images.


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