| 摘要 |
PROBLEM TO BE SOLVED: To provide a data synchronization system in which, when one acquisition terminal is connected to a plurality of provision terminals to acquire files, synchronization of the data of the files of provision terminals and of the acquisition terminal can be established. SOLUTION: In a content display device, when a content file is changed, the history of change is recorded in a log file. A PC is connected to the content display device and acquires a log file (S131), and until all records is processed (S133: NO), S133 to S141 are repeatedly executed. First, the records are read (S134), and a content file is read from a content file storage area (S135). Then, one record is added to an archive file (S138), the information before the update of the content file is stored (S139). Then, the content file is updated (S140), and the deletion instruction of the log file is transmitted to the content display device (S141). COPYRIGHT: (C)2008,JPO&INPIT
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