Tracking Meaning Over Time in the UMLS� Metathesaurus�

11/12/2002 (See also paper.)

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Table of Contents

Tracking Meaning Over Time in the UMLS� Metathesaurus�

The Structure of the UMLS Metathesaurus

Tracking CUIs & Concepts

Why CUIs Disappear

How are CUIs tracked?

Manual CUI Mapping

Determining the Best Map

Contents of MRCUI

MRCUI and MetamorphySys

Counts in the 2002AD Release

Mappings from Sources

Author: Tammy Powell

Home Page: http://www.nlm.nih.gov/mesh