UMLS Metathesaurus

This page describes the annual processes on UMLS release:

I. Introduction
UMLS Metathesaurus tables are very useful in many NLP projects. The basic usage is to get all English terms, concepts (CUI), preferred term of a concept, synonyms, etc. There are two releases annually, {YEAR}AA - in May and ${YEAR}AB - in Nov..

II. Source

• OCCS contacts: Steve Emrick
• Data supported by: Dr. Kin Wah Fung, Joe Chow
• Location: ash2:/u03/umls/Releases/${YEAR}${VERSION}/Full/RRF/META/

III. Processes

• Root Dir: ${META}
• Source files: ${META}/data/${UMLS_RELEASE}/org
  • MRCONSO.RRF
  • MRFILES.RRF
  • MRSTY.RRF
  • MRXNS_ENG.RRF
  • MRXNW_ENG.RRF
  • SemGroups.txt from The UMLS Semantic NetWork - Semantic Groups
• Programs:
  • 1.ProcessUmlsFiles
  • 2.GetAtoms

IV. Applications

• Lexical Tools Projects - Norm test
• STMT Projects - preProcess
• TC Projects - preProcess

V. References

• UMLS Terminology Services
• UMLS Home page
• UMLS Metathesaurus - Rich Release Format (RRF)
• UMLS Metathesaurus - MRCONSO.RRF field descriptions