11/17/08 2008AB UMLS Release available for download.
11/17/08 SNOMED CT® Spanish, RxTerms available for download.
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About the UMLS Resources
Metathesaurus; Semantic Network; SPECIALIST Lexicon and lexical tools; MetamorphoSys

Accessing UMLS Knowledge Sources
Metathesaurus license; Semantic Network; SPECIALIST Lexicon; DVD

Knowledge Source Server

Download files; search and browse; additional tools and resources
• New UMLS Knowledge Source Server (UMLSKS) Version 6.0 (beta)
• UMLS Knowledge Source Server (UMLSKS) Version 5.0

Documentation

Help
Training; contact us; FAQs; listserv

Metathesaurus Source Vocabularies

newUMLS Source Release Documentation
• SNOMED CT
• LOINC
• RxNorm
• MeSH
• List of Sources
• Source FAQs
• Mappings

More Resources

newUMLS Basics Web-based Tutorial
• UMLS News
• New Users' Guide to the UMLS
• UMLS Community
• Webcasts
• Metathesaurus License
• Tools
• Learning Resources
• MetaMap Transfer (MMTx)
• Archives


• Forthcoming UMLS Releases
About 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: 13 January 2009
Last updated: 13 January 2009
First published: 01 January 1999
Metadata| Permanence level: Permanence Not Guaranteed