Tracking Meaning Over Time in the UMLS� Metathesaurus�
The Structure of the UMLS Metathesaurus
Background
Tracking CUIs & Concepts
Why CUIs Disappear
How are CUIs tracked?
Manual CUI Mapping
Determining the Best Map
MRCUI
Contents of MRCUI
MRCUI and MetamorphySys
Counts in the 2002AD Release
Mappings from Sources
Summary
Home Page: http://www.nlm.nih.gov/mesh