engleski

Learning Semantic N-ary Relations from Wikipedia

Automated construction of ontologies from text corpora, which saves both time and human effort, is a principal condition for realizing the idea of the SemanticWeb. However, the recently proposed automated techniques are still limited in the scope of context that can be captured. Moreover, the source corpora generally lack the consensus of ontology users regarding the understanding and interpretation of ontology concepts. In this paper we introduce an unsupervised method for learning domain n-ary relations from Wikipedia articles, thus harvesting the consensus reached by the largest world community engaged in collecting and classifying knowledge. Providing ontologies with n-ary relations instead of the standard binary relations built on the subject-verb-object paradigm results in preserving the initial context of time, space, cause, reason or quantity that otherwise would be lost irreversibly. Our preliminary experiments with a prototype software tool show highly satisfactory results when extracting ternary and quaternary relations, as well as the traditional binary ones.

ontology construction; Semantic Web; Wikipedia; relation extraction; n-ary relations; natural language processing; syntax analysis; statistic parser

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