| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To search keywords of respective documents from a plurality of word strings included in the respective documents with high accuracy. <P>SOLUTION: A keyword search device includes a temporary keyword search means for searching the word strings with higher priority in the documents as temporary keywords among at least one or more word strings extracted from the respective documents concerning each of the plurality of documents; a search document number calculation means for calculating a search document number being the total number of documents from which the temporary keywords are searched among the plurality of documents; a priority correcting means for correcting the priorities of at least some word strings among the word strings of the respective documents from which the temporary keywords are searched, so as to allow the search document number to be equal to or less than a predetermined threshold, when the search document number exceeds the predetermined threshold corresponding to the document number; and a keyword search means for searching the keywords based on the corrected priorities concerning each of the documents. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
