INFORMATION PROCESSING DEVICE, PROGRAM AND INFORMATION PROCESSING METHOD

摘要

An information processing device of the present invention is provided with a specific portion extracting means that extracts a character string of a specific portion from each patent document data belonging to an analyzing subject document group, a word counting means that extracts words included in each character string and counts the number of the words; a sorting means that sorts, in ascending order of the number of the words, the character string extracted from the patent document data belonging to the analyzing subject document group; and a group judgment means that judges the degree of similarity between an upper character string and each lower character string in order from the upper character string sorted by the sorting means and also judges if the lower character string is made to belong to the same group as that of the upper character string based on the judgment of the degree of similarity, wherein the group judgment means skips a judgment of the degree of similarity between one character string judged to belong to the same group as that of an upper character string and the other character strings. This provides an information processing device that can easily grasp how the subject matter of each document is distributed in the large number of documents.