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Lexical Systems: A Report to the Board of Scientific Counselors
The Lexical Systems Group is a part of the Natural Language Systems (NLS) program at the Lister Hill Center of the National Library of Medicine (NLM), involved with the creation and maintenance of the SPECIALIST lexicon and tools that support and exploit it. The lexicon and its attendant lexical tools are one of the knowledge sources of the Unified Medical Language System (UMLS) and are distributed with the UMLS. The lexical tools are used in the creation and maintenance of the UMLS Metathesaurus and are needed to access the Metathesaurus through its indexes. The lexicon, lexical tools, and other natural language tools developed by the Lexical Systems Group are at the center of NLM's natural language research, providing a foundation for all our natural language processing efforts.