K. Takano and Y. Kiyoki (Japan)
superordinate and subordinate relationship, causal relation ship, context dependent, information retrieval, database system, vector space model
In this paper, we present a superordinate and subordinate relationship computation method. We have proposed a vector space search method for computing causal relation ships. We extend this method to compute directionality re lationships of superordinate and subordinate concepts. By using general knowledge expression with a tree structure, we generate vector spaces for computing those direction ality relationships. This method dealing with the combi nation of those directionality relationships makes it possi ble to realize a superordinate and subordinate relationship computation, according to various objectives related to di rectionality relationships. We have implemented a superor dinate and subordinate relationship computing system for directionality relationships among technical terms in the aerospace engineering field. We clarify the effectiveness and feasibility of our system by several experiments.
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