The Unified Medical Language System

UMLS Purpose

UMLS Components

UMLS Metathesaurus

1998 UMLS Metathesaurus

Some of the 1998 UMLS Source Vocabularies

UMLS Metathesaurus Structure

MRCON

MRSO

MRSTY

MRREL

Making of the Metathesaurus

Further Needs

Observations

Observations

Questions