Patent ID: 6574622
Filing Date: 2003-06-03
Classification: G06F,Y10S

Abstract:
A document retrieval system for execution of document retrieval of one or more documents in an unstructured database, comprising:a primary query designating part that designates a primary query as a provisional retrieval expression, the primary query being constituted by enumeration of arbitrary words based on an intention of a user; a query candidate synthesizing part that, on the basis of the primary query designated by the primary query designating part, synthesizes a query candidate group based on precollected information retrieved from the unstructured database during a non-query process for querying the unstructured database; and a feedback indicating part that performs relevance feedback which presents the query candidate group synthesized by said query candidate synthesizing part to the user, and performs relevance feedback for establishing a query selected from the thus-presented query candidate group as a query for the execution of document retrieval; a database which holds relational representation data included in the precollected information; and a relation expanding/reducing part extracting relation representation data corresponding to said primary query from the relational representation data held in said database, wherein said query candidate synthesizing part synthesizes the candidate group based on relational representation data extracted by said relation expanding/reducing part.