TEXT CLASSIFICATION DEVICE, TEXT CLASSIFICATION METHOD, AND TEXT CLASSIFICATION PROGRAM

摘要

A text classification device includes an important word extraction portion that extracts important words from analysis target text data, a distributed representation creation portion that creates distributed representations of words from related document data, a keyword candidate creation portion that extracts words near the important words as synonyms in the distributed representations of the words, a clustering portion that clusters the distributed representations of the important words and synonyms and creates a term cluster, and a viewpoint word creation portion that extracts a hypernym that is a word having a generalized concept of a term in the term cluster using a knowledge base in which relationships between terms are accumulated and creates a viewpoint dictionary in which a viewpoint word selected from the hypernyms is set as a headword and the terms included in the term cluster are set as keywords for the headword.