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# Property Keys

Constants for the keys for the properties you can get from an asset.

## Topics

### Constants

[`extern NSString * const ALAssetPropertyType;`](/documentation/AssetsLibrary/ALAssetPropertyType)

A key to retrieve the type of the asset.

[`extern NSString * const ALAssetPropertyLocation;`](/documentation/AssetsLibrary/ALAssetPropertyLocation)

The key to retrieve the location information of the asset.

[`extern NSString * const ALAssetPropertyDuration;`](/documentation/AssetsLibrary/ALAssetPropertyDuration)

The key to retrieve the play time duration of a video asset.

[`extern NSString * const ALAssetPropertyOrientation;`](/documentation/AssetsLibrary/ALAssetPropertyOrientation)

The key to retrieve the orientation of the asset.

[`extern NSString * const ALAssetPropertyDate;`](/documentation/AssetsLibrary/ALAssetPropertyDate)

The key to retrieve the creation date of the asset.

[`extern NSString * const ALAssetPropertyRepresentations;`](/documentation/AssetsLibrary/ALAssetPropertyRepresentations)

The key to retrieve the representations available for a given asset (for example RAW, JPEG).

[`extern NSString * const ALAssetPropertyURLs;`](/documentation/AssetsLibrary/ALAssetPropertyURLs)

The key to retrieve a dictionary that maps asset representations UTIs to URLs that uniquely identify the asset.

[`extern NSString * const ALAssetPropertyAssetURL;`](/documentation/AssetsLibrary/ALAssetPropertyAssetURL)

The key to retrieve a URL identifier for the asset.


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