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# Metadata Identifiers

Constants that describe metadata identifiers.

## Topics

### Constants

[`let kCMMetadataIdentifier_QuickTimeMetadataLocation_ISO6709: CFString`](/documentation/CoreMedia/kCMMetadataIdentifier_QuickTimeMetadataLocation_ISO6709)

Location information in ISO-6709 format.

[`let kCMMetadataIdentifier_QuickTimeMetadataDirection_Facing: CFString`](/documentation/CoreMedia/kCMMetadataIdentifier_QuickTimeMetadataDirection_Facing)

Direction the observer is facing.

[`let kCMMetadataIdentifier_QuickTimeMetadataPreferredAffineTransform: CFString`](/documentation/CoreMedia/kCMMetadataIdentifier_QuickTimeMetadataPreferredAffineTransform)

An affine transform to be applied to a video track.

[`let kCMMetadataIdentifier_QuickTimeMetadataVideoOrientation: CFString`](/documentation/CoreMedia/kCMMetadataIdentifier_QuickTimeMetadataVideoOrientation)

Video orientation as defined by TIFF/Exif.

[`let kCMMetadataIdentifier_QuickTimeMetadataLivePhotoStillImageTransformReferenceDimensions: CFString`](/documentation/CoreMedia/kCMMetadataIdentifier_QuickTimeMetadataLivePhotoStillImageTransformReferenceDimensions)

The dimensions of the live photo still image.

[`let kCMMetadataIdentifier_QuickTimeMetadataLivePhotoStillImageTransform: CFString`](/documentation/CoreMedia/kCMMetadataIdentifier_QuickTimeMetadataLivePhotoStillImageTransform)

A perspective transform you use to adjust a Live Photo still image to match the Live Photo movie.


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