Ontology schema reasoning method

PURPOSE: An ontology schema reasoning method is provided to reduce the time and cost for complete graph creation by judging a logical error and comprehension relation in an arrange order based on the arrangement in the order from a higher concept to a lower concept. CONSTITUTION: Plural concepts in ontology are arranged in the order from a higher concept to a lower concept(S201). According to the order of the arrange concept, the logical error for the each concept within the ontology is verified(S203). Based on the order of the arranged concepts, it is judged whether or not predetermined concept among the plural concepts is included in the higher or lower concepts(S205). On the basis of the judgment results, the inter-concept class structure among the ontology concept is estimated(S207).