To easily change the constitution and behavior of multimedia contents whose behavior is controlled on a time-driven base.

EPG(electric program guide) being a multimedia content is constituted of scenes having a hierarchical structure. Namely, EPG is constituted of a scene 0, which has scenes 01, 02 and 03 as slave scenes. The scene 02 has scenes 021, 022, 023 and 024 as the slave scenes. The scene 03 has scenes 031 and 032 as the slave scenes. The scene having the slave scenes also has an object which time-schedules the slave scenes.