| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a query suggestion device and method for displaying, to a user terminal, information for enabling a user to much more easily grasp association with his or her desired information including information which is not included in the past input history, retrieval log and retrieval index. <P>SOLUTION: In this query suggestion device 20, a phrase DB generation means 250 stores a phrase extracted from an object document in a phrase DB260, and a matching DB generating means 270 calculates relevance scores between words included in a retrieval index or the like and the object document, and stores the relevance scores in association with the words and the object document in a matching DB280, and the query estimation means 212 estimates a query based on query input operation information received from a user terminal 10, and a relevant phrase extraction means 213 generates a suggestion query with the phase of the object document whose relevance with the estimated query is high, and transmits it to the user terminal 10. <P>COPYRIGHT: (C)2012,JPO&INPIT |
