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The nature of lexical knowledge

A T McCray1

  • 1National Library of Medicine, Bethesda, MD, USA. mccray@nlm.nih.gov

Methods of Information in Medicine
|December 29, 1998
PubMed
Summary

This study explores lexical knowledge, crucial for language and natural language processing. It details the SPECIALIST lexicon and its application in handling text variations for medical information systems.

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Area of Science:

  • Computational Linguistics
  • Lexicology
  • Medical Informatics

Background:

  • The lexicon is fundamental to linguistic theory and natural language processing (NLP).
  • Understanding lexical knowledge is key for processing language and information.
  • Existing NLP systems increasingly rely on comprehensive lexical resources.

Purpose of the Study:

  • To examine the nature of lexical knowledge and its significance in language and information processing.
  • To present the scope and content of the SPECIALIST lexicon.
  • To discuss challenges in text processing due to lexical variation and introduce solutions.

Main Methods:

  • Comparative analysis of dictionaries, thesauri, and lexicons.
  • Distinction between words, lexical items, and terms.
  • Design and implementation of the SPECIALIST lexical programs to handle orthographic and lexical variations.

Main Results:

  • The SPECIALIST lexicon provides a foundation for morphologic, syntactic, and semantic processing.
  • The SPECIALIST lexical programs offer an approach to manage lexical variation in text.
  • Controlled terminologies for the medical domain are discussed in the context of the SPECIALIST lexicon.

Conclusions:

  • Lexical knowledge is central to both theoretical linguistics and practical NLP applications.
  • The SPECIALIST lexicon and associated programs are valuable resources for medical text processing.
  • Effective handling of lexical variation is essential for robust information processing systems.

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