DOCUMENT RETRIEVAL SYSTEM, QUESTION-ANSWERING SYSTEM, AND DOCUMENT RETRIEVAL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a highly precise document retrieval system capable of providing a retrieval result desired by a user.;SOLUTION: An information type desired by the user is detected from a retrieval request sentence inputted by the user. The retrieval request sentence is morphologically analyzed to generate a retrieval condition. A retrieval term appropriate for the detected information type is added to the generated retrieval condition to correct the retrieval condition. A retrieval is performed by use of the corrected retrieval condition. The retrieval result is presented to the user.;COPYRIGHT: (C)2005,JPO&NCIPI