Reorganizing Hierarchical Category Structure of Japanese Wikipedia for Knowledge Engineers

Abstract

Since Wikipedia is an on-line encyclopedia that covers varieties topics, there are several attempts to extracting knowledge from its contents. Wikipedia category is one type of information that provides topical index for the articles and organized as hierarchical manner. However, since hierarchical structure of Wikipedia category have different characteristics compared to the one for knowledge representation, it may not fully and correctly utilized at this moment. In this paper, we propose a method to extract hierarchical structure that have similar characteristics with knowledge representation.