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<meta name="twitter:description" content="What's New The 2024AB release of the Unified Medical Language System® (UMLS) Knowledge Sources is available for download as of November 4, 2024. Access it on the UMLS Download page. To access the UMLS Release files, you must have an active UMLS Metathesaurus® License and a valid UTS account. Upon download, you will be prompted to authenticate with an identity provider with the UTS.Available downloads: UMLS Metathesaurus Precomputed Subsets: Requires no installation, see below for more information.MRCONSO.RRF file: The most widely used Metathesaurus file.Full Release: UMLS Metathesaurus, Semantic Network, Specialist Lexicon and Lexical Tools, database load scripts, and MetamorphoSys for customizing your UMLS subset and browsing the data.UMLS Metathesaurus History Files: Contains historical data from the UMLS Metathesaurus from 2004AA to present.UMLS Metathesaurus Precomputed Subsets In past years, we have required MetamorphoSys to install and customize the UMLS Metathesaurus. We are now providing ready-to-use precomputed subsets of the...">
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<p class="tableOfContents"><strong>Table of Contents: <a href="/pubs/techbull/nd24/nd24_issue_cover.html">2024 NOVEMBER–DECEMBER No. 461</a></strong></p>
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<span class="previous"><a href="nd24_issue_cover.html">Previous</a></span> <span class="next"><a href="nd24_pharmacological_atm_pubmed.html">Next</a></span>
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<h1 class="articleH1">UMLS 2024AB Release Available</h1>
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<p class="tbyearmonth">UMLS 2024AB Release Available. NLM Tech Bull. 2024 Nov-Dec;(461):e1</p>
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<div class="articleactions">2024 November 04 <span class="status">[posted]</span>
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</div>
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<div class="articleParagraph">
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<h1><p>What's New </h1></p>
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<p>The 2024AB release of the Unified Medical Language System® (UMLS) Knowledge Sources is available for download as of November 4, 2024. Access it on the <a href="https://www.nlm.nih.gov/research/umls/licensedcontent/umlsknowledgesources.html">UMLS Download page</a>. </p>
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<p></p>
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<p>To access the UMLS Release files, you must have an active UMLS Metathesaurus® License and a valid UTS account. Upon download, you will be prompted to authenticate with an identity provider with the UTS.</p>
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<p></p>
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<p>Available downloads: </p>
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<ul>
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<li><strong> UMLS Metathesaurus Precomputed Subsets:</strong> Requires no installation, see below for more information.</li>
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<li><strong>MRCONSO.RRF file:</strong> The most widely used Metathesaurus file.</li>
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<li><strong>Full Release:</strong> UMLS Metathesaurus, Semantic Network, Specialist Lexicon and Lexical Tools, database load scripts, and MetamorphoSys for customizing your UMLS subset and browsing the data.</li>
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<li><strong>UMLS Metathesaurus History Files:</strong></b> Contains historical data from the UMLS Metathesaurus from 2004AA to present.</li>
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</ul>
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<p></p>
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<h1><p>UMLS Metathesaurus Precomputed Subsets </h1></p>
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<p>In past years, we have required MetamorphoSys to install and customize the UMLS Metathesaurus. We are now providing ready-to-use precomputed subsets of the UMLS Metathesaurus that require no installation or customization. As of 2024AB, precomputed subsets include obsolete and suppressible content.</p>
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<ul><li><strong>UMLS Metathesaurus Full Subset:</strong> Complete Metathesaurus data </ul></li>
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<ul><li><strong>UMLS Metathesaurus Level 0 Subset:</strong> Includes only level 0 source vocabularies. Level 0 vocabularies do not have any additional restrictions beyond the standard license terms. </ul></li>
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<p></p>
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<h1><p>UMLS Metathesaurus History Files </h1></p>
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<p>The following files contain historical data from the UMLS Metathesaurus starting with the 2004AA release: </p>
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<ul>
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<li><strong>Concept History (MRCONSO_HISTORY.txt)</strong> - This file contains all atoms, concepts, and codes dropped from the UMLS Metathesaurus MRCONSO.RRF. </li>
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<li><strong>Relation History (MRREL_HISTORY.txt)</strong> - This file contains all relations dropped from the UMLS Metathesaurus MRREL.RRF file. </li>
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<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. </ul></li>
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<p></p>
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<p>If you find these files useful, please provide feedback to the <a href="https://support.nlm.nih.gov/support/create-case/">NLM Help Desk</a> with the subject line: "UMLS History Files". </p>
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<p></p>
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<h1><p>Metathesaurus </h1></p>
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<p>The 2024AB Metathesaurus contains approximately 3.42 million concepts and 16.7 million unique concept names from 189 source vocabularies. </p>
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<p></p>
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<p>Two new translations:</p>
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<ul><li>MDRHRV is the Croatian Edition of the Medical Dictionary for Regulatory Activities Terminology (MedDRA). </ul></li>
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<ul><li>MDRLIT is the Lithuanian Edition of the Medical Dictionary for Regulatory Activities Terminology (MedDRA).</ul> </li>
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<p></p>
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<p>33 English sources and 42 translation sources have been updated. These include MeSH®, MedDRA, RxNorm, and SNOMED CT® (English and Spanish). For detailed information on changes in this version of the Metathesaurus, please refer to the <a href="https://www.nlm.nih.gov/research/umls/knowledge_sources/metathesaurus/release/updated_sources_expanded.html">Updated Sources (Expanded) </a>section. Additional release statistics can be found in the <a href="https://www.nlm.nih.gov/research/umls/knowledge_sources/metathesaurus/release/statistics.html">Statistics </a> section. </p>
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<p></p>
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<h1><p> MetamorphoSys </h1></p>
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<p> The full release requires 33.7 GB of disk space. MetamorphoSys can generate custom load scripts for MySQL, Oracle, or Microsoft Access when creating a Metathesaurus subset or installing the Semantic Network. Instructions are available on the <a href= "https://www.nlm.nih.gov/research/umls/implementation_resources/scripts/index.html">UMLS Load Scripts</a> homepage. </p>
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<p></p>
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<h1><p>UMLS Learning Resources </h1></p>
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<p>2024AB <a href="https://www.nlm.nih.gov/research/umls/sourcereleasedocs/">Source Release Documentation </a>webpages are available. </p>
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<p></p>
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<p>Additional information about the UMLS is available on the <a href="https://www.nlm.nih.gov/research/umls/index.html">UMLS homepage</a>. New users are encouraged to explore the <a href="https://www.nlm.nih.gov/research/umls/faq_main.html">UMLS FAQ</a> and other training materials. </p>
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<p></p>
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<h1><p>UMLS Terminology Services (UTS)</h1></p>
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The <a href="https://uts.nlm.nih.gov/uts/umls/home">UMLS Metathesaurus Browser</a> and the <a href="https://documentation.uts.nlm.nih.gov/rest/home.html">UMLS API</a> have been updated with the most recent release.
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<p></p>
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<p>To authenticate with the UMLS API, append an apiKey parameter to your request, for example: </p>
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<p>https://uts-ws.nlm.nih.gov/rest/content/current/CUI/C0155502/atoms?apiKey={{YOUR_API_KEY}} </p>
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<p></p>
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<h1><p>UMLS User Contributions</h1></p>
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<p>UMLS users have extended the functionality of the UMLS by developing APIs, automation scripts, and natural language processing tools. You can find a list of these on the <a href="https://www.nlm.nih.gov/research/umls/implementation_resources/community/index.html">UMLS Community web page</a>.
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<p></p>
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<p>Want to add your tool? Send a request to the <a href="https://support.nlm.nih.gov/support/create-case/">NLM Help Desk</a> with the subject line: "UMLS Community". Be sure to include a link to your source code so that other UMLS users can adapt your tool. We are especially interested in:</p>
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<ul>
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<li>Database load scripts </li>
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<li>Transformation scripts that convert UMLS data into other formats (for example, RDF or JSON).</li>
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<li>Scripts that automate any aspect of UMLS installation.</li>
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<li>Applications that leverage UMLS in text processing.</li></ul>
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<p></p>
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<p></p>
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<p>We value your feedback!</p>
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<p>For more information about improvements made to the UMLS based on user feedback, as well as information about UMLS usage, see our <a href="https://www.nlm.nih.gov/research/umls/implementation_resources/community/user_feedback.html">UMLS User Feedback Page</a>.</p>
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