Constructing Large-Scale General Ontology from Wikipedia

Abstract

We have built a Japanese large-scale general ontology restructured from Wikipedia, that represents a is-a relation hierarchy. A Wikipedia's article page belongs to one or more categories that are organized hierarchically by linking to others. However, there are the following two issues to be solved in order to use the categories and the articles as is-a ontology: (1) The higher levels of the hierarchy seems to be too abstract so that it cannot be applied directly into an ontology. (2) There are many not-is-a links seen in the articles, because of low-quality descriptions that may happen in consumer-generated media. In order to solve these, we (1) redefine the highest