| 摘要 |
PROBLEM TO BE SOLVED: To appropriately order a document database registered in an association retrieval server. SOLUTION: In an association retrieval server 30 capable of executing association retrieval by associating more than one document databases 403, 503 and 603 with each other, it becomes possible to hold a history of the association retrieval as an association retrieval recording table by a holding means 304 for recording table of association retrieval. By appropriately ordering display of document databases presented by a selecting means 202 for document database by means of a display means changing means 305 using the means 304, or calculation of registering fees for the document databases 403, 503 and 603 registered in the association retrieval server can be made appropriately by a calculating means 306 for registering fee.
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