commonKeyRelation A key that represents the relation information for the media. Declarationstatic let commonKeyRelation: AVMetadataKey See AlsoCommon metadata keyscommonKeyAccessibilityDescriptioncommonKeyAlbumNamecommonKeyArtistcommonKeyArtworkcommonKeyAuthorcommonKeyContributorcommonKeyCopyrightscommonKeyCreationDatecommonKeyCreatorcommonKeyDescriptioncommonKeyFormatcommonKeyIdentifiercommonKeyLanguagecommonKeyLastModifiedDatecommonKeyLocation