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<p class="tableOfContents"><strong>Table of Contents: <a href="/pubs/techbull/mj23/mj23_issue_cover.html">2023 MAY–JUNE No. 452</a></strong></p>
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<span class="previous"><a href="mj23_issue_cover.html">Previous</a></span> <span class="next"><a href="mj23_prs_2023_modernization.html">Next</a></span>
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<hr class="hr1" />
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<h1 class="articleH1">UMLS® 2023AA Release Available</h1>
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<p class="tbyearmonth">UMLS® 2023AA Release Available. NLM Tech Bull. 2023 Mar-Apr;(452):e1.</p>
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<div class="articleactions">2023 May 01 <span class="status">[posted]</span>
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<div class="articleParagraph">
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<p>The 2023AA release of the Unified Medical Language System® (UMLS) Knowledge Sources is available for <a href="https://www.nlm.nih.gov/research/umls/licensedcontent/umlsknowledgesources.html">download</a> as of May 1, 2023.</p>
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<p>The available downloads are:</p>
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<ul>
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<li><strong>NEW as of 2022AB:</strong> UMLS Metathesaurus Precomputed Subsets (requires no installation, see below for more information).</li>
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<li>RRF file (most widely used Metathesaurus file).</li>
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<li>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).</li>
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<li><strong>NEW as of 2022AB: </strong>UMLS Metathesaurus History Files (files that contain historical data from the UMLS Metathesaurus).</li>
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</ul>
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<p><h1>NEW as of 2022AB: UMLS Metathesaurus Precomputed Subsets</h1></p>
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<p>In past years, we have required the use of MetamorphoSys to install and customize the UMLS Metathesaurus. For the 2023AA release, we are providing two ready-to-use precomputed subsets of the UMLS Metathesaurus that require no installation or customization.</p>
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<ul>
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<li><strong>UMLS Metathesaurus Full Subset</strong> (complete Metathesaurus data without any customization).</li>
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<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).</li>
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</ul>
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<p><h1>NEW as of 2022AB: UMLS Metathesaurus History Files</h1></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 that were dropped from the UMLS Metathesaurus MRCONSO.RRF starting with the 2004AA release.</li>
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</ul>
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<ul>
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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 starting with the 2004AA release.</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 starting with the 2004AA release.</li>
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</ul>
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<p>These files are available from the <a href="https://www.nlm.nih.gov/research/umls/licensedcontent/umlsknowledgesources.html">UMLS Download page</a>.</p>
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<p>Please let us know if you find these files useful with comments to the <a href="https://support.nlm.nih.gov/support/create-case/">NLM Help Desk</a> using the subject line: "UMLS History Files."</p>
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<p><h1>Metathesaurus</h1></p>
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<p>The 2023AA Metathesaurus contains approximately 3.31 million concepts and 15.7 million unique concept names from 185 source vocabularies.</p>
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<p>One new language:</p>
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<ul>
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<li>Arabic (ARA).</li>
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</ul>
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<p>Three new translations:</p>
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<ul>
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<li>MDRARA (Arabic Edition of the Medical Dictionary for Regulatory Activities Terminology [MedDRA]).</li>
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<li>MDRGRE (Greek Edition of the Medical Dictionary for Regulatory Activities Terminology [MedDRA]).</li>
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<li>MDRPOL (Polish Edition of the Medical Dictionary for Regulatory Activities Terminology [MedDRA]).</li>
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</ul>
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<p>35 English sources and 44 translation sources were updated. These include MeSH®, MedDRA, RxNorm, and SNOMED CT® (English and Spanish). For detailed information on changes in this version of the Metathesaurus, see 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 may 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>For 2023AA, we made significant changes to our representation of the NCBI Taxonomy (SAB=NCBI). The UMLS will no longer use an algorithm for excluding concepts based on string patterns or hierarchy level. NCBI has added a new field (specified_species) indicating that a species in a node's lineage has a formal name. Beginning with this version, we will include the following content:</p>
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<ul>
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<li>Concepts where the "specified_species" value = 1.</li>
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<li>All higher level concepts needed to make a complete hierarchy.</li>
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</ul>
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<p>Other concepts are excluded. For more information, see the <a href="https://www.nlm.nih.gov/research/umls/sourcereleasedocs/current/NCBI/sourcerepresentation.html">Source Representation page</a>.</p>
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<p><h1>SPECIALIST Lexicon and Lexical Tools</h1></p>
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<ul>
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<li>The release includes the updated <a href="https://lhncbc.nlm.nih.gov/LSG/Projects/lexicon/current/web/index.html">SPECIALIST Lexicon</a> (2023 Release).</li>
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<li>The release includes the updated <a href="https://lhncbc.nlm.nih.gov/LSG/Projects/lvg/current/web/index.html">Lexical Tools</a> (2023 Release) which integrate data from the SPECIALIST Lexicon, 2023 Release. The Lexical Tools include the Full and Lite versions of lvg.2023.</li>
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<li>The Metathesaurus index files were processed using the updated lvg files.</li>
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</ul>
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<p><h1>MetamorphoSys</h1></p>
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<ul>
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<li>The full release requires 33.5 GB of disk space.</li>
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</ul>
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<p>Reported bugs may be viewed on the <a href="https://www.nlm.nih.gov/research/umls/knowledge_sources/metathesaurus/release/notes.html#bugs">Release Notes and Bugs</a> webpage.</p>
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<p>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><h1>Release Information</h1></p>
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<p>To access the UMLS Release files, you must have an active UMLS Metathesaurus® License and a valid <a href="https://uts.nlm.nih.gov/">UTS</a> account. You will be prompted to authenticate with an identity provider with the UTS when downloading the files.</p>
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<p><h1>UMLS Learning Resources</h1></p>
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<p>2023AA <a href="https://www.nlm.nih.gov/research/umls/sourcereleasedocs/index.html">Source Release Documentation</a> webpages are available.</p>
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<p>Additional information regarding 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 take the <a href="https://www.nlm.nih.gov/research/umls/new_users/online_learning/OVR_001.html">UMLS Basics Tutorial</a> and to explore the <a href="https://www.nlm.nih.gov/research/umls/quickstart.html">UMLS Quick Start Guide</a>, and other training materials.</p>
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<p><h1>UMLS Terminology Services (UTS)</h1></p>
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<p>The <a href="https://uts.nlm.nih.gov/uts/umls/home">UTS Metathesaurus Browser</a> and the <a href="https://documentation.uts.nlm.nih.gov/rest/home.html">UTS REST API</a> include the updated release.</p>
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<p>--</p>
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<p>UMLS REST API authentication has changed. You can now authenticate by simply appending 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>Authentication via ticket-granting tickets (TGTs) and service tickets is deprecated, but we will continue to accept API authentication via this method until the end of 2023.</p>
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<p><h1>UMLS User Contributions</h1></p>
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<p>UMLS users have extended the functionality of the UMLS in a variety of ways 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 webpage</a>.</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."</p>
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<p>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 the processing of text.</li>
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</ul>
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<p>We value your feedback! For more information about improvements we have made to the UMLS based on user feedback, as well as information about UMLS use in general, see our new <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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