Use, sell, rework, excerpt and use in any way on any platform. Placing this material on internal or public servers is also encouraged. The compiler is not aware of any export restrictions so freely distribute world-wide. Martha Ct., Arcata, CA 95521-4884. English nouns, verbs, adjectives and adverbs are organized into synonym sets, each representing one underlying lexical concept.
Different relations link the synonym sets.
This technology is freely available at CL Research and can be used to create ontologies and semantic networks from dictionary definitions, usually in less than a week. The Upper Cyc Ontology , approximately 3,000 terms capturing the most general concepts of human consensus reality. The Unified Medical Language System Knowledge Sources, Metathesaurus, Semantic Network, and other data available to those signing an experimental agreement. The database currently has about 110,000 entries. Free of copyright protection.