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Recent work on formal methods in computational lexicalsemantics has had theeffect of bringing many linguisticformalisms much closer to the knowledge representationlanguages used in artificial intelligence. Formalisms arenow emerging which may be more expressive and formallybetter understood than many knowledge representationlanguages. The interests of computational linguists nowextend to include such domains as commonsense knowledge,inheritance, default reasoning, collocational relations, andeven domain knowledge. With such an extension of the normalpurview of "linguistic" knowledge, one may question whetherthere is any logical justification for distinguishingbetween lexical semantics and commonsense reasoning.This volume explores the question from severalmethodologicaland theoretical perspectives. What emerges isa clear consensus that the notion of the lexicon and lexicalknowledge assumed in earlier linguistic research is grosslyinadequate and fails to address the deeper semantic issuesrequired for natural language analysis.
Sommario
Syntax-driven and ontology-driven lexical semantics.- Knowledge management for terminology-intensive applications: Needs and tools.- Logical structures in the lexicon.- Conventional metaphor and the lexicon.- Representation of semantic knowledge with term subsumption languages.- Predictable meaning shift: Some linguistic properties of Lexical Implication Rules.- Lexical operations in a unification-based framework.- Lexical structures for linguistic inference.- In so many words: Knowledge as a lexical phenomenon.- Redefining the "level" of the "word".- Lexical and world knowledge: Theoretical and applied viewpoints.- Aspectual requirements of temporal connectives: Evidence for a two-level approach to semantics.- A model for the interaction of lexical and non-lexical knowledge in the determination of word meaning.- For the lexicon that has everything.- Acquiring and representing semantic information in a lexical knowledge base.- General lexical representation for an effect predicate.- The autonomy of shallow lexical knowledge.- A two-level knowledge representation for machine translation: Lexical semantics and tense/aspect.- Lexicon, ontology, and text meaning.- Development of the concept dictionary - Implementation of lexical knowledge.- Presuppositions and default reasoning: A study in lexical pragmatics.
