Toward Integrating Concept Hierarchies
Paul Horng Jyh Wu · Institutional Repositories DataBase (IRDB) · 1993
Semantic processing normally requires constructing a concept hierarchy to, among others, provide the framework for assigning taxonomic relations in word definition or performing se-lectional restriction for subcategorization of predicates. Longman Dictionary of Contemporary English (LDOCE) [Pro78], for example, contains subject codes which form concept hierarchy of around 124 major categories. In order to obtain such concept hierarchy effectively, more and more researchers have tried to extract the hierarchy automatically fr m existing dictionaries, rather than to hand-craft a new hierarchy from scratch (e.g., [CBH]). However, the arising issue yet to be tackled is how to integrate concept hierarchies from different dictionaries where the hierarchies may have complementary properties. In this paper, we discuss a mechanism to integrate three concept hierarchies, each of which has distinct property. The interpretation of such operations in terms of the manipulation of semantic feature sets is discussed to shed light of what effects they have on the semantic property of the hierarchy. A preliminary implementation of the integration process is also described. The integrated concept hierarchy is then applied to selectional restriction task in micro-electronics domain, which was impossible without integrating the original hierarchies. 1