| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a file sharing system in which only a user terminal starting file sharing or a user terminal starting file edition can store the substance of a shared file and an optional user terminal can edit an optional shared file at any time when sharing the file among a plurality of user terminals and to provide its user terminal devices, a file sharing method and a program for the user terminals. <P>SOLUTION: A user terminal PeerA stores the substance of a shared file 21 as a substance file 21 when the shared file 21 is prepared, generates index information 41, 42 including information indicating its own user terminal and information indicating file edition availability/impossibility and transmits these pieces of index information 41, 42 to other user terminals PeerB, PeerC. The other user terminals PeerB, PeerC respectively prepare and store dummy files 31, 32 including the information indicating the user terminal which stores the substance file 21 and the information indicating file edition availability/impossible and not including the substance of the shared file and each access the substance file 21 on the basis of the dummy files 31, 32. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
