KEYWORD EXTRACTION METHOD, DEVICE THEREFOR AND COMPUTER-READABLE RECORDING MEDIUM RECORDING KEYWORD EXTRACTION PROGRAM

摘要

PROBLEM TO BE SOLVED: To make extractable a keyword of every division or all data and to make graspable both or one of features of all data and singularity/trend of each division by comparing the difference of statistical processing results of every division with each other against a large quantity of data which can be divided by various parameters. SOLUTION: An object data selection means 1 arranges the words of each document and other additional information to an object document set. An object data dividing means 2 divides the object document set into desired N pieces based on the additional information on each document. A partial statistical processing means 3 takes the statistics of words to each of divided N pieces of sets. A partial statistical processing result comparison means 4 compares the statistical results with each other based on N pieces of statistics and detects the difference of statistical results to decide the importance of words. A keyword extraction means 5 extracts a keyword by referring to the importance of words and sorting them. Thus, the features of all data and the singularity and/or trends of groups divided in all data can be grasped.