Semantic network

Semantics is the study of meaning, as inherent at the levels of words, phrases, sentences, and larger units of discourse. In the UNL approach, semantic values are expressed by three distinctive semantic entities: Universal Words, Attributes and Relations. Universal Words, or simply UWs, are expected to represent concepts, either simple or complex, that may figure as open class lexical items in natural languages. The set of UWs constitute the lexicon of UNL. Attributes and relations, on the other hand, are expected to represent semantic notions that are normally conveyed by closed class categories (such as prepositions and conjunctions) and other grammatical structures (such as affixes, prosody and word order).