A system allows a user to integrally manage content regardless whether the content is owned or not owned by the user. In a reproduction terminal, one piece of sort-out information is generated from one play list. Sort-out information is obtained by classifying the metadata of content registered with...http://www.google.com.tw/patents/US7925970?utm_source=gb-gplus-share專利 US7925970 - Information processing system that manages stored content using playlists
