S-Match is an open source Java framework for semantic matching. It contains semantic matching, minimal semantic matching and structure preserving semantic matching algorithm implementations.
WordNet® is an online lexical reference system whose design is inspired by current psycholinguistic theories of human lexical memory. English nouns, verbs, adjectives and adverbs are organized into synonym sets, each representing one underlying lexical concept. Different relations link the synonym sets.
E. Agirre, E. Alfonseca, K. Hall, J. Kravalova, M. Pasca, and A. Soroa. Proceedings of Human Language Technologies: The 2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics, page 19--27. Stroudsburg, PA, USA, Association for Computational Linguistics, (2009)
C. Cattuto, D. Benz, A. Hotho, and G. Stumme. The Semantic Web - ISWC 2008, volume 5318 of Lecture Notes in Computer Science, Springer Berlin / Heidelberg, (2008)
G. Ifrim, M. Theobald, and G. Weikum. Proceedings of the 22nd International Conference on Machine Learning - Learning in Web Search (LWS 2005), page 18--26. Bonn, Germany, (2005)
D. Lin. Proceedings of the Fifteenth International Conference on Machine Learning (ICML 1998), Madison, Wisconson, USA, July 24-27, 1998, page 296-304. Morgan Kaufmann, (1998)