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# AVMetadataKey

A structure that defines a metadata key.

```
struct AVMetadataKey
```

## Topics

### Common metadata keys

[`commonKeyAccessibilityDescription`](/documentation/AVFoundation/AVMetadataKey/commonKeyAccessibilityDescription)

A key that represents the accessibility description for the media.

[`commonKeyAlbumName`](/documentation/AVFoundation/AVMetadataKey/commonKeyAlbumName)

A key that represents the name of the album.

[`commonKeyArtist`](/documentation/AVFoundation/AVMetadataKey/commonKeyArtist)

A key that represents the name of the artist.

[`commonKeyArtwork`](/documentation/AVFoundation/AVMetadataKey/commonKeyArtwork)

A key that represents an image relating to the album.

[`commonKeyAuthor`](/documentation/AVFoundation/AVMetadataKey/commonKeyAuthor)

A key that represents the name of the author.

[`commonKeyContributor`](/documentation/AVFoundation/AVMetadataKey/commonKeyContributor)

A key that represents the name of the contributor.

[`commonKeyCopyrights`](/documentation/AVFoundation/AVMetadataKey/commonKeyCopyrights)

A key that represents the copyright statement.

[`commonKeyCreationDate`](/documentation/AVFoundation/AVMetadataKey/commonKeyCreationDate)

A key that represents the date of the original recording.

[`commonKeyCreator`](/documentation/AVFoundation/AVMetadataKey/commonKeyCreator)

A key that represents the name of the creator.

[`commonKeyDescription`](/documentation/AVFoundation/AVMetadataKey/commonKeyDescription)

A key that represents the description of the media.

[`commonKeyFormat`](/documentation/AVFoundation/AVMetadataKey/commonKeyFormat)

A key that represents the file format of the media content.

[`commonKeyIdentifier`](/documentation/AVFoundation/AVMetadataKey/commonKeyIdentifier)

A key that represents the ID for the media.

[`commonKeyLanguage`](/documentation/AVFoundation/AVMetadataKey/commonKeyLanguage)

A key that represents the language of the text or lyrics spoken or sung in the audio.

[`commonKeyLastModifiedDate`](/documentation/AVFoundation/AVMetadataKey/commonKeyLastModifiedDate)

A key that represents the last modification date of the media.

[`commonKeyLocation`](/documentation/AVFoundation/AVMetadataKey/commonKeyLocation)

A key that represents the location information for the media.

[`commonKeyMake`](/documentation/AVFoundation/AVMetadataKey/commonKeyMake)

A key that represents the name of the camera maker.

[`commonKeyModel`](/documentation/AVFoundation/AVMetadataKey/commonKeyModel)

A key that represents the name of the camera model.

[`commonKeyPublisher`](/documentation/AVFoundation/AVMetadataKey/commonKeyPublisher)

A key that represents the name of the publisher.

[`commonKeyRelation`](/documentation/AVFoundation/AVMetadataKey/commonKeyRelation)

A key that represents the relation information for the media.

[`commonKeySoftware`](/documentation/AVFoundation/AVMetadataKey/commonKeySoftware)

A key that represents the name of the software used to create the media.

[`commonKeySource`](/documentation/AVFoundation/AVMetadataKey/commonKeySource)

A key that represents the source information for the media.

[`commonKeySubject`](/documentation/AVFoundation/AVMetadataKey/commonKeySubject)

A key that represents the subject information for the media.

[`commonKeyTitle`](/documentation/AVFoundation/AVMetadataKey/commonKeyTitle)

A key that represents the title of the media.

[`commonKeyType`](/documentation/AVFoundation/AVMetadataKey/commonKeyType)

A key that represents the media type.

### iTunes metadata keys

[`iTunesMetadataKeyAccountKind`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyAccountKind)

A key that represents the kind of iTunes account.

[`iTunesMetadataKeyAcknowledgement`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyAcknowledgement)

A key that represents the acknowledgement information in iTunes.

[`iTunesMetadataKeyAlbum`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyAlbum)

A key that represents the name of the album in iTunes.

[`iTunesMetadataKeyAlbumArtist`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyAlbumArtist)

A key that represents the artist for the album.

[`iTunesMetadataKeyAppleID`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyAppleID)

A key that represents an Apple ID.

[`iTunesMetadataKeyArranger`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyArranger)

A key that represents the name of the arranger.

[`iTunesMetadataKeyArtDirector`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyArtDirector)

A key that represents the name of the art director.

[`iTunesMetadataKeyArtist`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyArtist)

A key that represents the name of the artist.

[`iTunesMetadataKeyArtistID`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyArtistID)

A key that represents the ID for an artist.

[`iTunesMetadataKeyAuthor`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyAuthor)

A key that represents the name of the author.

[`iTunesMetadataKeyBeatsPerMin`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyBeatsPerMin)

A key that represents the beats per minute of a track in iTunes.

[`iTunesMetadataKeyComposer`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyComposer)

A key that represents the name of the composer.

[`iTunesMetadataKeyConductor`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyConductor)

A key that represents the name of the conductor.

[`iTunesMetadataKeyContentRating`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyContentRating)

A key that represents the content rating in iTunes.

[`iTunesMetadataKeyCopyright`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyCopyright)

A key that represents the copyright statement in iTunes.

[`iTunesMetadataKeyCoverArt`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyCoverArt)

A key that represents an album cover image.

[`iTunesMetadataKeyCredits`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyCredits)

A key that represents the credits for the source content.

[`iTunesMetadataKeyDescription`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyDescription)

A key that represents the description information in iTunes.

[`iTunesMetadataKeyDirector`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyDirector)

A key that represents the name of the director.

[`iTunesMetadataKeyDiscCompilation`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyDiscCompilation)

A key that represents whether an album is a compilation of tracks in iTunes.

[`iTunesMetadataKeyDiscNumber`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyDiscNumber)

A key that represents the disc number of a multi-CD album in iTunes.

[`iTunesMetadataKeyEncodedBy`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyEncodedBy)

A key that represents the person or organization that encoded the media.

[`iTunesMetadataKeyEncodingTool`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyEncodingTool)

A key that represents the software or hardware and settings used for encoding.

[`iTunesMetadataKeyEQ`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyEQ)

A key that represents the equalizer preset option in iTunes.

[`iTunesMetadataKeyExecProducer`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyExecProducer)

A key that represents the name of the executive producer.

[`iTunesMetadataKeyGenreID`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyGenreID)

A key that represents the genre ID.

[`iTunesMetadataKeyGrouping`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyGrouping)

A key that represents additional grouping information for an album.

[`iTunesMetadataKeyLinerNotes`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyLinerNotes)

A key that represents the digital booklet for an album.

[`iTunesMetadataKeyLyrics`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyLyrics)

A key that represents the lyrics in the recording.

[`iTunesMetadataKeyOnlineExtras`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyOnlineExtras)

A key that represents the extra materials for an album.

[`iTunesMetadataKeyOriginalArtist`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyOriginalArtist)

A key that represents the name of the original artist.

[`iTunesMetadataKeyPerformer`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyPerformer)

A key that represents the name of the performer.

[`iTunesMetadataKeyPhonogramRights`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyPhonogramRights)

A key that represents the phonogram rights statement.

[`iTunesMetadataKeyPlaylistID`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyPlaylistID)

A key that represents the playlist ID.

[`iTunesMetadataKeyPredefinedGenre`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyPredefinedGenre)

A key that represents the predefined genre.

[`iTunesMetadataKeyProducer`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyProducer)

A key that represents the name of the producer.

[`iTunesMetadataKeyPublisher`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyPublisher)

A key that represents the name of the publisher.

[`iTunesMetadataKeyRecordCompany`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyRecordCompany)

A key that represents the name of the record company.

[`iTunesMetadataKeyReleaseDate`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyReleaseDate)

A key that represents the release date for the original recording.

[`iTunesMetadataKeySoloist`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeySoloist)

A key that represents the name of the soloist.

[`iTunesMetadataKeySongID`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeySongID)

A key that represents the song ID.

[`iTunesMetadataKeySongName`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeySongName)

A key that represents the name of the song in iTunes.

[`iTunesMetadataKeySoundEngineer`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeySoundEngineer)

A key that represents the name of the sound engineer.

[`iTunesMetadataKeyThanks`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyThanks)

A key that represents the thanks statement in iTunes.

[`iTunesMetadataKeyTrackNumber`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyTrackNumber)

A key that represents the order number in iTunes.

[`iTunesMetadataKeyTrackSubTitle`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyTrackSubTitle)

A key that represents the information relating to the contents title.

[`iTunesMetadataKeyUserComment`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyUserComment)

A key that represents a user comment regarding the content.

[`iTunesMetadataKeyUserGenre`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyUserGenre)

A key that represents the genre set by a user in iTunes.

### QuickTime metadata keys

[`quickTimeMetadataKeyAccessibilityDescription`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyAccessibilityDescription)

A key that represents the accessibility description for the movie file content.

[`quickTimeMetadataKeyAlbum`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyAlbum)

A key that represents the name of the album or collection in QuickTime.

[`quickTimeMetadataKeyArranger`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyArranger)

A key that represents the name of the arranger of the movie file content.

[`quickTimeMetadataKeyArtist`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyArtist)

A key that represents the name of the artist of the movie file content.

[`quickTimeMetadataKeyArtwork`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyArtwork)

A key that represents an image relating to the movie file content.

[`quickTimeMetadataKeyAuthor`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyAuthor)

A key that represents the name of the author of the movie file content.

[`quickTimeMetadataKeyCameraFocalLength35mmEquivalent`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraFocalLength35mmEquivalent)

A value of type kCMMetadataBaseDataType_UTF8 indicating focal length normalized to the 35mm film equivalent value (e.g. “50.00mm”).

[`quickTimeMetadataKeyCameraFrameReadoutTime`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraFrameReadoutTime)

A key that represents the camera frame readout time in QuickTime.

[`quickTimeMetadataKeyCameraISOSensitivity`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraISOSensitivity)

A value of type kCMMetadataBaseDataType_UTF8 indicating the sensitivity of the camera to light in terms of ISO exposure index (e.g. “800”). See SMPTE RDD 18.

[`quickTimeMetadataKeyCameraIdentifier`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraIdentifier)

A key that represents the camera identifier in QuickTime.

[`quickTimeMetadataKeyCameraLensIrisFNumber`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraLensIrisFNumber)

A value of type kCMMetadataBaseDataType_UTF8 indicating measure of the amount of light transmitted through the lens. It is the focal length divided by the effective lens aperture diameter (e.g. “F2.8” or “2.8”).

[`quickTimeMetadataKeyCameraLensModel`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraLensModel)

A value of type kCMMetadataBaseDataType_UTF8 indicating the lens model (e.g. “iPhone 16 Pro back camera 6.765mm f/1.78”).

[`quickTimeMetadataKeyCameraShutterSpeedAngle`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraShutterSpeedAngle)

A value of type kCMMetadataBaseDataType_UTF8 indicating the exposure period expressed as an angle in minutes (1/60 degree) (e.g. “21600” or “360.00deg””).

[`quickTimeMetadataKeyCameraShutterSpeedTime`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraShutterSpeedTime)

A value of type kCMMetadataBaseDataType_UTF8 indicating the exposure period expressed as a time per one frame/field period in seconds.

[`quickTimeMetadataKeyCameraWhiteBalance`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraWhiteBalance)

A value of type kCMMetadataBaseDataType_UTF8 indicating the white balance value defined by the temperature in Kelvin units (e.g. “5500K” or “5500”). See SMPTE RDD 18.

[`quickTimeMetadataKeyCinematicVideoIntent`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCinematicVideoIntent)

A value of type `kCMMetadataBaseDataType_UInt8` indicating whether this movie is intended as a Cinematic Video (1) or not (0).

[`quickTimeMetadataKeyCollectionUser`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCollectionUser)

A key that represents a name that indicates a user-defined collection.

[`quickTimeMetadataKeyComment`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyComment)

A key that represents a comment regarding the movie file content.

[`quickTimeMetadataKeyComposer`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyComposer)

A key that represents the name of the composer of the movie file content.

[`quickTimeMetadataKeyContentIdentifier`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyContentIdentifier)

A key that represents the content identifier in QuickTime.

[`quickTimeMetadataKeyCopyright`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCopyright)

A key that represents the copyright statement for the movie file content.

[`quickTimeMetadataKeyCreationDate`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCreationDate)

A key that represents the creation date of the movie file content.

[`quickTimeMetadataKeyCredits`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCredits)

A key that represents the credits of the movie source content.

[`quickTimeMetadataKeyDescription`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyDescription)

A key that represents the description of the movie file content.

[`quickTimeMetadataKeyDirectionFacing`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyDirectionFacing)

A key that represents the direction the camera is facing during the shot.

[`quickTimeMetadataKeyDirectionMotion`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyDirectionMotion)

A key that represents the direction the camera is moving during the shot.

[`quickTimeMetadataKeyDirector`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyDirector)

A key that represents the name of the director of the movie file content.

[`quickTimeMetadataKeyDisplayName`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyDisplayName)

A key that represents the display name of the movie file content.

[`quickTimeMetadataKeyEncodedBy`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyEncodedBy)

A key that represents the name of the person or organization responsible for encoding the movie file content.

[`quickTimeMetadataKeyFullFrameRatePlaybackIntent`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyFullFrameRatePlaybackIntent)

An key that represents whether this movie should play at full frame rate.

[`quickTimeMetadataKeyGenre`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyGenre)

A key that represents the genre or genres to which the movie content conforms.

[`quickTimeMetadataKeyInformation`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyInformation)

A key that represents general information about the movie file content.

[`quickTimeMetadataKeyIsMontage`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyIsMontage)

A key that represents that the movie is a montage of other media.

[`quickTimeMetadataKeyKeywords`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyKeywords)

A key that represents the keywords for the movie file content.

[`quickTimeMetadataKeyLocationBody`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyLocationBody)

A key that represents the astronomical body for compatibility with the 3GPP format.

[`quickTimeMetadataKeyLocationDate`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyLocationDate)

A key that represents a date and time using the extended format defined in ISO 8601:2004.

[`quickTimeMetadataKeyLocationISO6709`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyLocationISO6709)

A key that represents the geographic point location by coordinates as defined in ISO 6709:2008.

[`quickTimeMetadataKeyLocationName`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyLocationName)

A key that represents the name of the location.

[`quickTimeMetadataKeyLocationNote`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyLocationNote)

A key that represents a descriptive comment about the location.

[`quickTimeMetadataKeyLocationRole`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyLocationRole)

A key that represents the single byte describing the movie location.

[`quickTimeMetadataKeyMake`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyMake)

A key that represents the name of the camera maker.

[`quickTimeMetadataKeyModel`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyModel)

A key that represents the name of the camera model.

[`quickTimeMetadataKeyOriginalArtist`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyOriginalArtist)

A key that represents the name of the original artist of the movie file content.

[`quickTimeMetadataKeyPerformer`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyPerformer)

A key that represents the name of the performer in the movie file content.

[`quickTimeMetadataKeyPhonogramRights`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyPhonogramRights)

A key that represents the phonogram rights statement.

[`quickTimeMetadataKeyProducer`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyProducer)

A key that represents the name of the producer of the movie file content.

[`quickTimeMetadataKeyPublisher`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyPublisher)

A key that represents the name of the publisher of the movie file content.

[`quickTimeMetadataKeyRatingUser`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyRatingUser)

A key that represents the rating or relative value of the movie.

[`quickTimeMetadataKeySoftware`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeySoftware)

A key that represents the name of software used to create the movie file content.

[`quickTimeMetadataKeyTitle`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyTitle)

A key that represents the title of the movie file content.

[`quickTimeMetadataKeyWhiteBalanceByCCTColorMatrices`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyWhiteBalanceByCCTColorMatrices)

A value of type kCMMetadataBaseDataType_RawData indicating the reference color translation matrix data for ProRes RAW.

[`quickTimeMetadataKeyWhiteBalanceByCCTWhiteBalanceFactors`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyWhiteBalanceByCCTWhiteBalanceFactors)

A value of type kCMMetadataBaseDataType_RawData indicating the reference white balance multiplication factor data for ProRes RAW.

[`quickTimeMetadataKeyYear`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyYear)

A key that represents the recording year of the movie file content.

[`quickTimeMetadataKeyiXML`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyiXML)

A key that represents iXML information for the movie file content.

### QuickTime user metadata keys

[`quickTimeUserDataKeyAccessibilityDescription`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyAccessibilityDescription)

A key that represents the accessibility description for the movie file content.

[`quickTimeUserDataKeyAlbum`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyAlbum)

A key that represents the name of the album or collection in QuickTime.

[`quickTimeUserDataKeyArranger`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyArranger)

A key that represents the name of the arranger of the movie file content.

[`quickTimeUserDataKeyArtist`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyArtist)

A key that represents the name of the artist of the movie file content.

[`quickTimeUserDataKeyAuthor`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyAuthor)

A key that represents the name of the author of the movie file content.

[`quickTimeUserDataKeyChapter`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyChapter)

A key that represents the name of the chapter.

[`quickTimeUserDataKeyComment`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyComment)

A key that represents a comment regarding the movie file content.

[`quickTimeUserDataKeyComposer`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyComposer)

A key that represents the name of the composer of the movie file content.

[`quickTimeUserDataKeyCopyright`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyCopyright)

A key that represents the copyright statement in QuickTime.

[`quickTimeUserDataKeyCreationDate`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyCreationDate)

A key that represents the creation date of the movie file content.

[`quickTimeUserDataKeyCredits`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyCredits)

A key that represents the credits of movie source content.

[`quickTimeUserDataKeyDescription`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyDescription)

A key that represents the description of the movie file content.

[`quickTimeUserDataKeyDirector`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyDirector)

A key that represents the name of the director of the movie file content.

[`quickTimeUserDataKeyDisclaimer`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyDisclaimer)

A key that represents the disclaimer regarding the movie file content.

[`quickTimeUserDataKeyEncodedBy`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyEncodedBy)

A key that represents the name of the person or organization responsible for encoding the movie file content.

[`quickTimeUserDataKeyFullName`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyFullName)

A key that represents the full name of the movie file content.

[`quickTimeUserDataKeyGenre`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyGenre)

A key that represents the genre or genres to which the movie content conforms.

[`quickTimeUserDataKeyHostComputer`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyHostComputer)

A key that represents the name of the host computer.

[`quickTimeUserDataKeyInformation`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyInformation)

A key that represents general information about the movie file content.

[`quickTimeUserDataKeyKeywords`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyKeywords)

A key that represents the keywords for the movie file content.

[`quickTimeUserDataKeyLocationISO6709`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyLocationISO6709)

A key that represents the geographic point location by coordinates as defined in ISO 6709:2008.

[`quickTimeUserDataKeyMake`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyMake)

A key that represents the name of the camera maker.

[`quickTimeUserDataKeyModel`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyModel)

A key that represents the name of the camera model.

[`quickTimeUserDataKeyOriginalArtist`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyOriginalArtist)

A key that represents the name of the original artist of the movie file content.

[`quickTimeUserDataKeyOriginalFormat`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyOriginalFormat)

A key that represents the original format of the movie file content.

[`quickTimeUserDataKeyOriginalSource`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyOriginalSource)

A key that represents the original source of the movie file content.

[`quickTimeUserDataKeyPerformers`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyPerformers)

A key that represents the name of the performers in the movie file content.

[`quickTimeUserDataKeyPhonogramRights`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyPhonogramRights)

A key that represents the phonogram rights statement.

[`quickTimeUserDataKeyProducer`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyProducer)

A key that represents the name of the producer of the movie file content.

[`quickTimeUserDataKeyProduct`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyProduct)

A key that represents the name of the product.

[`quickTimeUserDataKeyPublisher`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyPublisher)

A key that represents the name of the publisher of the movie file content.

[`quickTimeUserDataKeySoftware`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeySoftware)

A key that represents the name of software used to create the movie file content.

[`quickTimeUserDataKeySpecialPlaybackRequirements`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeySpecialPlaybackRequirements)

A key that represents the special hardware and software requirements for playback.

[`quickTimeUserDataKeyTaggedCharacteristic`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyTaggedCharacteristic)

A key that represents the tagged characteristic.

[`quickTimeUserDataKeyTrack`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyTrack)

A key that represents a track in the movie file content.

[`quickTimeUserDataKeyTrackName`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyTrackName)

A key that represents the name of a track in the movie file content.

[`quickTimeUserDataKeyURLLink`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyURLLink)

A key that represents the webpage for the movie file content.

[`quickTimeUserDataKeyWarning`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyWarning)

A key that represents the warning text for the movie file content.

[`quickTimeUserDataKeyWriter`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyWriter)

A key that represents the name of the writer of the movie file content.

### ID3 metadata keys

[`id3MetadataKeyAlbumSortOrder`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyAlbumSortOrder)

A key that represents how to sort the album.

[`id3MetadataKeyAlbumTitle`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyAlbumTitle)

A key that represents the title of the recording.

[`id3MetadataKeyAttachedPicture`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyAttachedPicture)

A key that represents an image relating to the audio file.

[`id3MetadataKeyAudioEncryption`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyAudioEncryption)

A key that represents the encryption details of the audio stream.

[`id3MetadataKeyAudioSeekPointIndex`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyAudioSeekPointIndex)

A key that represents the list of seek points within the audio file.

[`id3MetadataKeyBand`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyBand)

A key that represents additional information about the performers in the recording.

[`id3MetadataKeyBeatsPerMinute`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyBeatsPerMinute)

A key that represents the beats per minute of the audio.

[`id3MetadataKeyComments`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyComments)

A key that represents additional text information for the media.

[`id3MetadataKeyCommercial`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyCommercial)

A key that represents the commercial details for the media.

[`id3MetadataKeyCommercialInformation`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyCommercialInformation)

A key that represents the webpage containing purchasing information.

[`id3MetadataKeyComposer`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyComposer)

A key that represents the name of the composer.

[`id3MetadataKeyConductor`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyConductor)

A key that represents the name of the conductor.

[`id3MetadataKeyContentGroupDescription`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyContentGroupDescription)

A key that indicates the sound belongs to a larger category of sounds or music.

[`id3MetadataKeyContentType`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyContentType)

A key that represents the media content type.

[`id3MetadataKeyCopyright`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyCopyright)

A key that represents the copyright statement.

[`id3MetadataKeyCopyrightInformation`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyCopyrightInformation)

A key that represents the webpage describing the terms of use and ownership.

[`id3MetadataKeyDate`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyDate)

A key that represents the date for the recording.

[`id3MetadataKeyEncodedBy`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEncodedBy)

A key that represents the person or organization responsible for encoding the media.

[`id3MetadataKeyEncodedWith`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEncodedWith)

A key that represents the software or hardware and settings used for encoding.

[`id3MetadataKeyEncodingTime`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEncodingTime)

A key that represents the encoding time of the audio.

[`id3MetadataKeyEncryption`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEncryption)

A key that represents the encryption method used.

[`id3MetadataKeyEqualization`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEqualization)

A key that represents the equalization curve within the audio file.

[`id3MetadataKeyEqualization2`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEqualization2)

A key that represents the equalization curve within the audio file.

[`id3MetadataKeyEventTimingCodes`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEventTimingCodes)

A key that represents the timing codes used for synchronization with key events in a song or sound.

[`id3MetadataKeyFileOwner`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyFileOwner)

A key that represents the name of the owner or licensee of the file and it’s contents.

[`id3MetadataKeyFileType`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyFileType)

A key that represents the file type of the audio.

[`id3MetadataKeyGeneralEncapsulatedObject`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyGeneralEncapsulatedObject)

A key that represents the details of a file.

[`id3MetadataKeyGroupIdentifier`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyGroupIdentifier)

A key that represents the grouping of distinct frames.

[`id3MetadataKeyInitialKey`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyInitialKey)

A key that represents the musical key in which the sound starts.

[`id3MetadataKeyInternationalStandardRecordingCode`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyInternationalStandardRecordingCode)

A key that represents the international standard recording code.

[`id3MetadataKeyInternetRadioStationName`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyInternetRadioStationName)

A key that represents the name of the internet radio station streaming the audio.

[`id3MetadataKeyInternetRadioStationOwner`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyInternetRadioStationOwner)

A key that represents the name of the owner of the internet radio station streaming the audio.

[`id3MetadataKeyInvolvedPeopleList_v23`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyInvolvedPeopleList_v23)

A key that represents the list of names of contributors to the media.

[`id3MetadataKeyInvolvedPeopleList_v24`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyInvolvedPeopleList_v24)

A key that represents the list of names of contributors to the media.

[`id3MetadataKeyLanguage`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyLanguage)

A key that represents the language of the text or lyrics spoken or sung in the audio.

[`id3MetadataKeyLeadPerformer`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyLeadPerformer)

A key that represents the main artist of the recording.

[`id3MetadataKeyLength`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyLength)

A key that represents the length of the audio file in milliseconds.

[`id3MetadataKeyLink`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyLink)

A key that represents the link information from an ID3 tag that might reside in another audio file or alone in a binary file.

[`id3MetadataKeyLyricist`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyLyricist)

A key that represents the writer(s) of the text or lyrics in the recording.

[`id3MetadataKeyMediaType`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyMediaType)

A key that represents which media the sound originated from.

[`id3MetadataKeyModifiedBy`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyModifiedBy)

A key that represents the people behind a remix and similar interpretations of another existing piece.

[`id3MetadataKeyMood`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyMood)

A key that represents the mood of the audio.

[`id3MetadataKeyMPEGLocationLookupTable`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyMPEGLocationLookupTable)

A key that represents the lookup table used to increase performance and accuracy of jumps within an MPEG audio file.

[`id3MetadataKeyMusicCDIdentifier`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyMusicCDIdentifier)

A key that represents the ID used to identify the CD in databases such as the Compact Disc Database.

[`id3MetadataKeyMusicianCreditsList`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyMusicianCreditsList)

A key that represents the mapping between an instrument and the musician that played it.

[`id3MetadataKeyOfficialArtistWebpage`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOfficialArtistWebpage)

A key that represents the artist’s official webpage.

[`id3MetadataKeyOfficialAudioFileWebpage`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOfficialAudioFileWebpage)

A key that represents the official webpage for the audio file.

[`id3MetadataKeyOfficialAudioSourceWebpage`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOfficialAudioSourceWebpage)

A key that represents the official webpage for the source of the audio file.

[`id3MetadataKeyOfficialInternetRadioStationHomepage`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOfficialInternetRadioStationHomepage)

A key that represents the official homepage of the internet radio station.

[`id3MetadataKeyOfficialPublisherWebpage`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOfficialPublisherWebpage)

A key that represents the official webpage for the publisher.

[`id3MetadataKeyOriginalAlbumTitle`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOriginalAlbumTitle)

A key that represents the title of the original recording or source of sound.

[`id3MetadataKeyOriginalArtist`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOriginalArtist)

A key that represents the performer(s) of the original recording.

[`id3MetadataKeyOriginalFilename`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOriginalFilename)

A key that represents the original filename for the recording.

[`id3MetadataKeyOriginalLyricist`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOriginalLyricist)

A key that represents the text writer(s) of the original recording.

[`id3MetadataKeyOriginalReleaseTime`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOriginalReleaseTime)

A key that represents the release time for the original recording.

[`id3MetadataKeyOriginalReleaseYear`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOriginalReleaseYear)

A key that represents the release year for the original recording.

[`id3MetadataKeyOwnership`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOwnership)

A key that represents the transaction details indicating proof of ownership if signed.

[`id3MetadataKeyPartOfASet`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPartOfASet)

A key that represents the part of a set the audio came from.

[`id3MetadataKeyPayment`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPayment)

A key that represents the webpage that handles the process of paying for the audio file.

[`id3MetadataKeyPerformerSortOrder`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPerformerSortOrder)

A key that represents the performer sort order.

[`id3MetadataKeyPlayCounter`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPlayCounter)

A key that represents the play count of the audio file.

[`id3MetadataKeyPlaylistDelay`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPlaylistDelay)

A key that represents the number of milliseconds of silence between every song in a playlist.

[`id3MetadataKeyPopularimeter`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPopularimeter)

A key that represents the rating for the audio file.

[`id3MetadataKeyPositionSynchronization`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPositionSynchronization)

A key that represents the time offset of the first frame in the stream.

[`id3MetadataKeyPrivate`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPrivate)

A key that represents the information from a software producer that its program uses.

[`id3MetadataKeyProducedNotice`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyProducedNotice)

A key that represents the produced notice.

[`id3MetadataKeyPublisher`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPublisher)

A key that represents the name of the label or publisher.

[`id3MetadataKeyRecommendedBufferSize`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyRecommendedBufferSize)

A key that represents the buffer size the server recommends.

[`id3MetadataKeyRecordingDates`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyRecordingDates)

A key that represents additional recording dates that complement year, date, and time keys.

[`id3MetadataKeyRecordingTime`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyRecordingTime)

A key that represents the recording time.

[`id3MetadataKeyRelativeVolumeAdjustment`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyRelativeVolumeAdjustment)

A key that represents the increase or decrease of volume on each channel while the file plays.

[`id3MetadataKeyRelativeVolumeAdjustment2`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyRelativeVolumeAdjustment2)

A key that represents the increase or decrease of volume on each channel while the file plays.

[`id3MetadataKeyReleaseTime`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyReleaseTime)

A key that represents the time of the first release.

[`id3MetadataKeyReverb`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyReverb)

A key that represents the adjustments to echoes of different kinds.

[`id3MetadataKeySeek`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySeek)

A key that represents the location of other tags in a file or stream.

[`id3MetadataKeySetSubtitle`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySetSubtitle)

A key that represents the set subtitle the track belongs to.

[`id3MetadataKeySignature`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySignature)

A key that represents the group of frames to sign.

[`id3MetadataKeySize`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySize)

A key that represents the size of the audio file in bytes.

[`id3MetadataKeySubTitle`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySubTitle)

A key that represents the information relating to the contents title.

[`id3MetadataKeySynchronizedLyric`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySynchronizedLyric)

A key that represents the words in the audio file as text in sync with the audio.

[`id3MetadataKeySynchronizedTempoCodes`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySynchronizedTempoCodes)

A key that represents the tempo codes used for a more accurate description of the tempo of a musical piece.

[`id3MetadataKeyTaggingTime`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyTaggingTime)

A key that represents the time of tagging.

[`id3MetadataKeyTermsOfUse`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyTermsOfUse)

A key that represents the brief description of the terms of use and ownership of the file.

[`id3MetadataKeyTime`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyTime)

A key that represents the time for the recording.

[`id3MetadataKeyTitleDescription`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyTitleDescription)

A key that represents the name of the piece.

[`id3MetadataKeyTitleSortOrder`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyTitleSortOrder)

A key that represents the title sort order.

[`id3MetadataKeyTrackNumber`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyTrackNumber)

A key that represents the order number of the audio file.

[`id3MetadataKeyUniqueFileIdentifier`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyUniqueFileIdentifier)

A key that represents the identifier used to indicate the audio file in a database.

[`id3MetadataKeyUnsynchronizedLyric`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyUnsynchronizedLyric)

A key that represents the lyrics of the song or a text transcription of other vocal activities.

[`id3MetadataKeyUserText`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyUserText)

A key that represents the user text information frame.

[`id3MetadataKeyUserURL`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyUserURL)

A key that represents the user webpage frame.

[`id3MetadataKeyYear`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyYear)

A key that represents the year of the recording.

[`id3MetadataKeyCommerical`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyCommerical)

A key that represents the commerical frame.

### 3GP user metadata keys

[`metadata3GPUserDataKeyAlbumAndTrack`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyAlbumAndTrack)

A key that represents the text for the album and track titles.

[`metadata3GPUserDataKeyAuthor`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyAuthor)

A key that represents the author of the media.

[`metadata3GPUserDataKeyCollection`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyCollection)

A key that represents the collection name for the media.

[`metadata3GPUserDataKeyCopyright`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyCopyright)

A key that represents the copyright statement.

[`metadata3GPUserDataKeyDescription`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyDescription)

A key that represents the description for the media.

[`metadata3GPUserDataKeyGenre`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyGenre)

A key that represents the genre of the media.

[`metadata3GPUserDataKeyKeywordList`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyKeywordList)

A key that represents the list of keywords for the media.

[`metadata3GPUserDataKeyLocation`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyLocation)

A key that represents the location information for the media.

[`metadata3GPUserDataKeyMediaClassification`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyMediaClassification)

A key that represents the classification of the media content.

[`metadata3GPUserDataKeyMediaRating`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyMediaRating)

A key that represents the rating of the media content.

[`metadata3GPUserDataKeyPerformer`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyPerformer)

A key that represents information about the performer.

[`metadata3GPUserDataKeyRecordingYear`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyRecordingYear)

A key that represents the recording year for the media.

[`metadata3GPUserDataKeyThumbnail`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyThumbnail)

A key that represents the media thumbnail.

[`metadata3GPUserDataKeyTitle`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyTitle)

A key that represents the title for the media.

[`metadata3GPUserDataKeyUserRating`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyUserRating)

A key that represents the user rating.

### ISO user metadata keys

[`isoUserDataKeyAccessibilityDescription`](/documentation/AVFoundation/AVMetadataKey/isoUserDataKeyAccessibilityDescription)

A key that represents the accessibility description for the media content.

[`isoUserDataKeyCopyright`](/documentation/AVFoundation/AVMetadataKey/isoUserDataKeyCopyright)

A key that represents the copyright statement.

[`isoUserDataKeyDate`](/documentation/AVFoundation/AVMetadataKey/isoUserDataKeyDate)

A key that represents the date for the media content.

[`isoUserDataKeyTaggedCharacteristic`](/documentation/AVFoundation/AVMetadataKey/isoUserDataKeyTaggedCharacteristic)

A key that represents the tagged media characteristic used for identifying accessibility features.

### ICY metadata keys

[`icyMetadataKeyStreamTitle`](/documentation/AVFoundation/AVMetadataKey/icyMetadataKeyStreamTitle)

A key that represents the title of a stream.

[`icyMetadataKeyStreamURL`](/documentation/AVFoundation/AVMetadataKey/icyMetadataKeyStreamURL)

A key that represents the web address of a stream.

### Initializers

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

Creates a metadata key.

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

Creates a metadata key with the specified raw value.


---

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