| 摘要 |
A digital document system in which a digital document in a communication network is shared between a plurality of stations, said system comprising: a first station ( 101 A) having a first digital document (DD 1 ) comprising a thumbnail data item (TH 1 ) and an original data item (HR 1 ); a second station ( 102 A) having a second digital document (DD 2 ) comprising a thumbnail data item (TH 1 ); and a center station ( 100 A) comprising: calculating means for calculating signatures of the thumbnail data items (TH 1, TH 2 ) of the first and second digital documents (DD 1, DD 2 ); comparing means for comparing the calculated signatures of the thumbnail data items (TH 1, TH 2 ); and transmitting means for transmitting information for accessing the original data item (HR 1 ) of the first digital document (DD 1 ) to the second station ( 102 A) according to a result of the comparison.
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