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# AVMetadataKeySpace

A structure that defines a metadata key space.

```
struct AVMetadataKeySpace
```

## Topics

### Common key space

[`common`](/documentation/AVFoundation/AVMetadataKeySpace/common)

The common key space.

### Format-specific key spaces

[`audioFile`](/documentation/AVFoundation/AVMetadataKeySpace/audioFile)

The AudioToolbox audio file key space.

[`hlsDateRange`](/documentation/AVFoundation/AVMetadataKeySpace/hlsDateRange)

The HTTP Live Streaming key space.

[`iTunes`](/documentation/AVFoundation/AVMetadataKeySpace/iTunes)

The iTunes key space.

[`icy`](/documentation/AVFoundation/AVMetadataKeySpace/icy)

The Icecast/ShoutCAST streaming key space.

[`id3`](/documentation/AVFoundation/AVMetadataKeySpace/id3)

The ID3 key space.

[`isoUserData`](/documentation/AVFoundation/AVMetadataKeySpace/isoUserData)

The ISO key space.

[`quickTimeMetadata`](/documentation/AVFoundation/AVMetadataKeySpace/quickTimeMetadata)

The QuickTime metadata key space.

[`quickTimeUserData`](/documentation/AVFoundation/AVMetadataKeySpace/quickTimeUserData)

The QuickTime user data key space.

### Initializers

[`init(_:)`](/documentation/AVFoundation/AVMetadataKeySpace/init(_:))

Creates a key space with a string.

[`init(rawValue:)`](/documentation/AVFoundation/AVMetadataKeySpace/init(rawValue:))

Creates a key space with a raw string value.


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