| http://www.w3.org/ns/prov#value | - More specifically, in a case where the download acceptance unit 13 receives a download request from the backup destination server 6A, for example, the download acceptance unit 13 judges whether there is a complete or substantial match between this date and time and a date and time that is designated in advance by the backup source server 3 with respect to the backup destination server 6A (that is,
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