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# Metadata types

Inspect the supported metadata object types that the framework supports.

## Topics

### 2D and 3D codes

[`AVMetadataMachineReadableCodeObject`](/documentation/AVFoundation/AVMetadataMachineReadableCodeObject)

Barcode information detected by a metadata capture output.

### Faces

[`AVMetadataFaceObject`](/documentation/AVFoundation/AVMetadataFaceObject)

Face information detected by a metadata capture output.

### Heads

[`AVMetadataCatHeadObject`](/documentation/AVFoundation/AVMetadataCatHeadObject)

A concrete metadata object subclass representing a cat head.

[`AVMetadataDogHeadObject`](/documentation/AVFoundation/AVMetadataDogHeadObject)

A concrete metadata object subclass representing a dog head.

### Bodies

[`AVMetadataBodyObject`](/documentation/AVFoundation/AVMetadataBodyObject)

An abstract class that defines the interface for a metadata body object.

[`AVMetadataCatBodyObject`](/documentation/AVFoundation/AVMetadataCatBodyObject)

An object representing a single detected cat body in a picture.

[`AVMetadataDogBodyObject`](/documentation/AVFoundation/AVMetadataDogBodyObject)

An object representing a single detected dog body in a picture.

[`AVMetadataHumanBodyObject`](/documentation/AVFoundation/AVMetadataHumanBodyObject)

An object representing a single detected human body in a picture.

[`AVMetadataHumanFullBodyObject`](/documentation/AVFoundation/AVMetadataHumanFullBodyObject)

An object that represents a detected human full body in a picture.

### Saliency

[`AVMetadataSalientObject`](/documentation/AVFoundation/AVMetadataSalientObject)

An object representing a single salient area in a picture.


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