The NLM Unified Medical Language System (UMLS) project develops and distributes multi-purpose, electronic "Knowledge Sources" and associated lexical tools for system developers. Researchers will find the UMLS products useful in investigating knowledge representation and retrieval questions.
Last reviewed: 14 January 2009 Last updated: 14 January 2009 First published: 01 January 1999 Metadata| Permanence level: Permanence Not Guaranteed