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# AVContentKeySpecifier

An object that uniquely identifies a content key.

```
class AVContentKeySpecifier
```

## Topics

### Creating a specifier

[`init(forKeySystem:identifier:options:)`](/documentation/AVFoundation/AVContentKeySpecifier/init(forKeySystem:identifier:options:))

Creates a content key specifier.

[`contentKeySpecifierForKeySystem:identifier:options:`](/documentation/AVFoundation/AVContentKeySpecifier/contentKeySpecifierForKeySystem:identifier:options:)

A convenience initializer to create a content key specifier.

### Inspecting a specifier

[`identifier`](/documentation/AVFoundation/AVContentKeySpecifier/identifier)

The container and protocol-specific key identifier.

[`keySystem`](/documentation/AVFoundation/AVContentKeySpecifier/keySystem)

The key system that generates content keys.

[`options`](/documentation/AVFoundation/AVContentKeySpecifier/options)

A dictionary of options with which you initialized the specifier.


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