| 摘要 |
PROBLEM TO BE SOLVED: To perform a retrieving process by a method corresponding to user's intention to retrieve by allowing a retrieval means to input a retrieval word and restriction conditions extracted by an extracting means and perform the retrieving process. SOLUTION: This device is equipped with clients 100 which output retrieval conditions for retrieving desired documents and a retrieval engine which can generate a dislocation file 102 from a document data base (DB) 101 and perform vector space retrieval and Boolean retrieval and also equipped with a retrieval server 103 which inputs the retrieval conditions from the clients 100 and retrieves the corresponding documents by using the dislocation file 102 according to the inputted retrieval conditions. Then a retrieval condition sentence described in a natural language is inputted as a retrieval request, the structure of the retrieval condition sentence is analyzed according to previously set conditions, and a retrieval word and restriction conditions are extracted from the retrieval condition sentence. Further, the retrieval server 103 inputs the extracted retrieval word and restriction conditions and performs a retrieving process. |
