Simple categories matching copyrighted:

• content,
• works,
• source,
• artwork,
• medium,
• work,
• data,
• information,
• product,
• item,
• file,
• music,
• article,
• publication,
• material,
• procedure,
• photograph,
• character,

Members with property copyrighted:

• book,
• music_audio,
• music_information,
• text_book,
• music,
• bill,
• game,
• great_pattern,
• virgin_music,
• news,
• jewelry_design,
• photo,
• movie,
• song,
• engineering,
• game_cover,
• image_information,
• choral_music,
• article,
• document,
• commercial,
• architectural_design,
• new_edition,
• play,
• papers,
• parody,
• software,
• video,
• print_publication,
• cd,
• drawing,
• digital_music,
• text,
• brand,
• newsletter,
• contact_information,
• magazine,
• application,
• cartoon,
• compilation,
• movie_file,
• teaching_material,
• audio_file,
• exclusive_design,
• renewal,
• product_information,
• book_extract,
• chart,
• photograph,
• arrangement,
• football_shirt,
• mpeg_video,
• professional_photograph,
• share_product,
• revised_edition,
• electronic_book,
• photography,
• political_cartoon,
• sound_recoding,
• educational_test,
• cartoon_figure,
• video_file,
• record,
• copyrighted_picture,
• church_hymn,
• digital_lock,
• video_clip,
• screen_shot,
• technical_documentation,
• art,
• journal_article,
• official_artwork,
• wire-service_photo,
• musical_works,
• animation,
• company_history,
• box_shot,
• pattern,
• information,
• literature,
• book_chapter,
• report,
• graphics,
• textual_works,
• thunderbird_vehicle,
• teaching,
• television_series,
• registration,
• logos,
• copyright,
• supplemental_reading,
• written_material,
• image,
• picture,
• writing,
• passage,
• program,
• assignment,
• popular_game,
• pricing_decision,
• oil-painting_photograph,
• sound,
• literary_works,
• videotape,
• formula,
• publication,
• training_documentation,
• television_celebrity,
• commercial_product,
• painting,
• sculpture,
• educational_material,
• picture_file,
• dc_character,
• documentation,
• recording,
• password_protection,
• dramatization,
• database,
• writings,
• audio,
• hobbit,
• event_calendar,
• extract_figure,
• newspaper,
• music_cd,
• architectural_drawing,
• dvd,
• journal,
• image_photo,
• textbook,
• online_news,
• essay,
• audio_information,
• advertisement,
• book_list,
• background,
• musical_recording,
• icon,
• fair_use,
• unpublished_document,
• song_lyric,
• music_file,
• video_works,
• artistic_work,
• motion-picture_scores,
• section,
• bourne_ultimatum,
• written_works,
• toy,
• design,
• film,