UMLS Knowledge Sources: File Downloads

2013AA UMLS Full Release Files May 8, 2013 02:00:00 PM ET
The full release includes every vocabulary in the Metathesaurus.
2013AA.CHK
2013AA.MD5
2013AA-1-meta.nlm
2013AA-2-meta.nlm
2013AA-otherks.nlm
mmsys.zip
Copyright_Notice.txt
README.txt

2013AA UMLS Active Release Files May 8, 2013 02:00:00 PM ET
The active release only includes vocabularies that are actively updated in the Metathesaurus.
2013AA.CHK
2013AA.MD5
2013AA-1-meta.nlm
2013AA-2-meta.nlm
2013AA-otherks.nlm
mmsys.zip
Copyright_Notice.txt
README.txt

Download Notes:

Download and extract all UMLS data and zip files to the same directory.
Read the README file before downloading, which includes information on installing the UMLS Knowledge Sources and highlights changes for this release.
Additional documentation is available at http://www.nlm.nih.gov/research/umls.
At 1M bits/second, it will take approximately 4 hours to download the complete UMLS release. Use a high-speed internet connection to download the files.
Each UMLS release includes MetamorphoSys, required to install Knowledge Sources files, and to create, search and browse customized Metathesaurus subsets. MetamorphoSys requires a minimum of 30 GB of free hard disk and takes 2-10 hours to run on a range of platforms tested. The actual time will depend on your configuration, hardware and operating system platforms.