nih-gov/www.nlm.nih.gov/research/umls/licensedcontent/umlsknowledgesources.html
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<div class="h1">UMLS Knowledge Sources: File Downloads</div>
</div>
</div>
<div class="grid-row grid-gap-1"><!-- start row-->
<div class="tablet:grid-col-12"><!-- start column-->
<p>
<a class="usa-link"
href="https://www.nlm.nih.gov/research/umls/knowledge_sources/metathesaurus/release/index.html">
Release Information
</a>
<br />
<a class="usa-link"
href="https://www.nlm.nih.gov/research/umls/implementation_resources/metamorphosys/help.html">
MetamorphoSys Installation Help
</a>
</p>
<hr />
<h2>
2024AB UMLS Metathesaurus Precomputed Subsets
</h2>
<p>
Ready-to-use subsets of the UMLS Metathesaurus that require no installation or customization. As of 2024AB, precomputed subsets include obsolete and suppressible content. These subsets do not include MetamorphoSys, the Semantic
Network, or the Specialist Lexicon and Lexical Tools.
</p>
<table class="usa-table border-base-lighter margin-bottom-4">
<thead>
<tr>
<th scope="col" style="min-width: 300px;">
Release
</th>
<th scope="col" style="min-width: 400px;">
Description
</th>
<th scope="col">
File Size (compressed)
</th>
<th scope="col">
File Size (uncompressed)
</th>
<th scope="col" style="min-width: 150px;">
Date
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<a class="usa-link"
href="https://download.nlm.nih.gov/umls/kss/2024AB/umls-2024AB-metathesaurus-full.zip">
UMLS Metathesaurus Full Subset
</a>
</td>
<td>
<strong>
Download the UMLS Metathesaurus Full Subset if you want to load the complete Metathesaurus
data directly into your local environment without any subsetting or additional
customization.
</strong>
MYSQL and Oracle load scripts are included. To browse the UMLS Metathesaurus data, visit the
<a class="usa-link" href="https://uts.nlm.nih.gov/uts/umls/home">
UMLS Metathesaurus Browser</a>.
<br />
<br />
MD5 checksum: f9fc1131d64778acf5cc43a9ead31f97
</td>
<td>
5.0 GB
</td>
<td>
33.7 GB
</td>
<td>
November 4, 2024
</td>
</tr>
<tr>
<td>
<a class="usa-link"
href="https://download.nlm.nih.gov/umls/kss/2024AB/umls-2024AB-metathesaurus-level-0.zip">
UMLS Metathesaurus Level 0 Subset
</a>
<br />
<td>
<strong>
This subset includes only level 0 source vocabularies
</strong>
. Level 0 vocabularies do not have any additional restrictions beyond the standard license
terms. MYSQL and Oracle load scripts are included.
<br />
<br />
MD5 checksum: 76cff7f099c49afb74cc8d2d2716027c
</td>
<td>
1.8 GB
</td>
<td>
10.0 GB
</td>
<td>
November 4, 2024
</td>
</td>
</tr>
<tr>
<td>
<a class="usa-link" href="https://download.nlm.nih.gov/umls/kss/2024AB/umls-2024AB-mrconso.zip">
MRCONSO.RRF
</a>
</td>
<td>
<strong>
The most widely used UMLS file.
</strong>
This file includes names, codes, and concepts from over 200 source vocabularies.
<a class="usa-link" href="https://www.ncbi.nlm.nih.gov/books/NBK9685/#ch03.sec3.3.4">
More information...
</a>
<br />
<br />
MD5 checksum: 10050c166e2cc465aa40b76caf2a758c
</td>
<td>
453.0 MB
</td>
<td>
2.0 GB
</td>
<td>
November 4, 2024
</td>
</tr>
</tbody>
</table>
<p>
We are considering a new approach to generating UMLS subsets, and we would like your feedback. The new
approach may involve producing new precomputed subsets or configuring subsets in a web browser instead of in
MetamorphoSys. We are interested in knowing which features of MetamorphoSys our users consider essential.
Please submit your comments to the
<a class="usa-link" href="https://support.nlm.nih.gov/support/create-case/">
NLM Help Desk
</a>
using the subject line: &ldquo;UMLS Subsets&rdquo;
</p>
<table class="usa-table usa-table--border-base-lighter margin-bottom-3">
<h2>
2024AB Full UMLS Release Files
</h2>
<thead>
<tr>
<th scope="col" style="min-width: 270px;">
Release
</th>
<th scope="col" style="min-width: 350px;">
Description
</th>
<th scope="col">
File Size (compressed)
</th>
<th scope="col">
File Size (uncompressed)
</th>
<th scope="col" style="min-width: 150px;">
Date
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<a class="usa-link" href="https://download.nlm.nih.gov/umls/kss/2024AB/umls-2024AB-full.zip">
Full Release (umls-2024AB-full.zip)
</a>
</td>
<td>
The full release includes the UMLS Metathesaurus, Semantic Network, Specialist Lexicon and
Lexical Tools, database load scripts, and MetamorphoSys for customizing your UMLS subset and
browsing the data.
</td>
<td>
5.0 GB
</td>
<td>
35.6 GB
</td>
<td>
November 4, 2024
</td>
</tr>
</tbody>
</table>
<div>
<p>
<b>
Download Notes:
</b>
</p>
<ul>
<li>
Download the UMLS zip file and extract the contents to a single directory.
<li>
Read the README file after downloading, which includes information on installing the UMLS Knowledge
Sources and highlights changes for this release.
</li>
<li>
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 40
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.
</li>
</li>
</ul>
</div>
<table class="usa-table margin-bottom-4">
<hr>
<h2>
UMLS Metathesaurus History Files
</h2>
<p>
These files include historical data from the UMLS Metathesaurus starting with the 2004AA
release. Please let us know if you find these files useful by submitting your comments to the
<a class="usa-link" href="https://support.nlm.nih.gov/support/create-case/">
NLM Help Desk
</a>
using the subject line: &ldquo;UMLS History Files&rdquo;.
</p>
<thead>
<tr>
<th scope="col" style="min-width: 220px;">
Release
</th>
<th scope="col" style="min-width: 400px;">
Description
</th>
<th>
File Size (compressed)
</th>
<th>
File Size (uncompressed)
</th>
<th scope="col" style="min-width: 150px;">
Date
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<a class="usa-link" href="https://download.nlm.nih.gov/umls/kss/2024AB/umls-history.zip">
UMLS History Files
</a>
</td>
<td>
<ul>
<li>
<strong>
Concept History (MRCONSO_HISTORY.txt)
</strong>
- This file contains all atoms, concepts, and codes that were dropped from the UMLS
Metathesaurus MRCONSO.RRF starting with the 2004AA release. This file resembles the
<a class="usa-link"
href="https://www.ncbi.nlm.nih.gov/books/NBK9685/table/ch03.T.concept_names_and_sources_file_mr/">
MRCONSO.RRF file
</a>
, but there is an additional column that indicates the last version of the UMLS in which
each atom appeared.
</li>
<li>
<strong>
Relation History (MRREL_HISTORY.txt)
</strong>
- This file contains all relations dropped from the UMLS Metathesaurus MRREL.RRF file
starting with the 2004AA release. This file resembles the
<a class="usa-link"
href="https://www.ncbi.nlm.nih.gov/books/NBK9685/table/ch03.T.related_concepts_file_mrrel_rrf/">
MRREL.RRF
</a>
, but there is an additional column that indicates the last version of the UMLS in which
the relation appeared.
</li>
<li>
<strong>
Source Vocabulary History (MRSAB_HISTORY.txt)
</strong>
- This file includes a row for every version of every UMLS source vocabulary updated in
the UMLS Metathesaurus MRSAB.RRF file starting with the 2004AA release. This file
resembles the
<a class="usa-link"
href="https://www.ncbi.nlm.nih.gov/books/NBK9685/table/ch03.T.source_information_file_mrsab_rrf/">
MRSAB.RRF
</a>
file, but there is an additional column that indicates the version in which the UMLS
source vocabulary was updated.
</li>
</ul>
<p>
MD5 checksum: 2eb523aa91ac67663954c5312f298457
</p>
</td>
<td>
1.1 GB
</td>
<td>
7.6 GB
</td>
<td>
November 4, 2024
</td>
</tr>
</tbody>
</table>
<p>
<a class="usa-link" href="http://www.nlm.nih.gov/research/umls/licensedcontent/umlsarchives04.html">
UMLS Release Archives
</a>
<br />
</p>
</div><!-- end column-->
</div><!-- end row-->
<p class=”margin-top-5”><small>Last Reviewed: October 31, 2024</small></p>
</div>
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