| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an information retrieval device that uses plural retrieval request keywords for performing high-speed confidential retrieval without false retrieval. <P>SOLUTION: An information retrieval device includes an index 3001 for storing a retrieval history. When receiving a retrieval request, the information retrieval device searches the retrieval history in the index 3001, instead of all data retrieval, to increase retrieval speed. The index 3001 includes a keyword-count-specific index 3002 at each count of retrieval request keywords. The keyword-count-specific index 3002 includes plural entries each having an entry representative source tag 3004 and an entry retrieval query 3006 corresponding to the retrieval request keywords. With this structure, the indices 3001 are formed so as to be classified according to retrieval conditions, and the information retrieval device performs confidential retrieval without false retrieval. <P>COPYRIGHT: (C)2012,JPO&INPIT |
