The UMLS Semantic Network FilesThe National Library of Medicine

The Lister Hill National Center for Biomedical Communications The National Library of Medicine

The UMLS Semantic Network files are distributed subject to these terms and conditions.

Download the current Semantic Network files:
 
The SRFIL File The SRFIL file (File Description)
The SRFIL File The SRFLD file (Field Description)
The SRDEF File The SRDEF file (Basic information about the Semantic Types and Relations)
The SRSTR File The SRSTR file (Structure of the Network)
The SRSTRE1 File The SRSTRE1 file (Fully inherited set of Relations (UIs))
The SRSTRE2 File The SRSTRE2 file (Fully inherited set of Relations (Names))
The SU File The SU file (Unit Record)
Lister Hill National Center for Biomedical Communications
National Library of Medicine
National Institutes of Health
Department of Health & Human Services
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