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<p class="tableOfContents"><strong>Table of Contents: <a href="/pubs/techbull/mj18/mj18_issue_cover.html">2018 MAY&#8211;JUNE No. 422</a></strong></p>
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<h1 class="articleH1">UMLS 2018AA Release Available</h1>
<p class="tbyearmonth">Wilder V. UMLS 2018AA Release Available. NLM Tech Bull. 2018 May-Jun;(422):e1.</p>
<div class="articleactions">2018 May 08 <span class="status">[posted]</span>
</div>
<div class="articleParagraph">
<p>The 2018AA release of the Unified Medical Language System (UMLS) Knowledge Sources is available for <a href="http://www.nlm.nih.gov/research/umls/licensedcontent/umlsknowledgesources.html">download</a> as of May 7, 2018.</p>
<p><strong>Metathesaurus</strong><br />
The 2018AA Metathesaurus contains approximately 3.67 million concepts and 14 million unique concept names from 203 source vocabularies.</p>
<p>One new source:</p>
<ul>
<li>MED-RT (Medication Reference Terminology)</li>
</ul>
<p>One new NCI sub-source:</p>
<ul>
<li>NCI_CTRP-SDC (NCI Clinical Trials Reporting Program)</li>
</ul>
<p>NDF-RT update:</p>
<ul>
<li>This release includes the final update of NDF-RT. Note that MED-RT is its successor.</li>
</ul>
<p>Sixty-three English sources and 40 translation sources were updated.&nbsp;These include MeSH, MedDRA, RxNorm, and SNOMED CT® (English and Spanish).&nbsp;A complete list is available in the <a href="http://www.nlm.nih.gov/research/umls/knowledge_sources/metathesaurus/release/updated_sources.html">Updated Sources</a> section of the <a href="http://www.nlm.nih.gov/research/umls/knowledge_sources/metathesaurus/release/index.html">Release Documentation</a>. For more detailed information on changes in this version of the Metathesaurus, see the <a href="http://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="http://www.nlm.nih.gov/research/umls/knowledge_sources/metathesaurus/release/statistics.html">Statistics</a> section.</p>
<p>
<strong>SPECIALIST Lexicon and Lexical Tools</strong></p>
<ul>
<li>The release includes the updated <a href="hhttps://web.archive.org/web/20191214051537/https://lexsrv3.nlm.nih.gov/LexSysGroup/Projects/lexicon/current/web/index.html">SPECIALIST Lexicon</a> (2018 Release).</li>
<li>The release includes the updated <a href="https://web.archive.org/web/20191213125443/https://lexsrv3.nlm.nih.gov/LexSysGroup/Projects/lvg/current/web/index.html">Lexical Tools</a> (2018 Release) which integrate data from the SPECIALIST Lexicon, 2018 Release. The Lexical Tools include the Full and Lite versions of lvg.2018.</li>
<li>The Metathesaurus index files were processed using the updated lvg files.</li>
<li>The updated SPECIALIST Lexicon and Lexical Tools feature synonym enhancements that include changes to their file structure. See the <a href="https://web.archive.org/web/20191214174658/https://lsg3.nlm.nih.gov/LexSysGroup/Projects/lexicon/current/docs/designDoc/UDF/synonyms/index.html">SPECIALIST Lexicon</a> and <a href="https://web.archive.org/web/20191214174658/https://lsg3.nlm.nih.gov/LexSysGroup/Projects/lvg/current/web/index.html">Lexical Tools</a> Web sites for details about these file changes and other updates.</li>
</ul>
<p><strong>MetamorphoSys</strong></p>
<ul>
<li>The full release requires 28.2 GB of disk space.</li>
</ul>
<p>
Reported bugs may be viewed on the <a href="http://www.nlm.nih.gov/research/umls/knowledge_sources/metathesaurus/release/notes.html#bugs">Release Notes and Bugs</a> Web page. </p>
<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="http://www.nlm.nih.gov/research/umls/implementation_resources/scripts/index.html">UMLS Load Scripts</a> homepage. </p>
<p><strong>Release Information</strong><br />
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 for your UTS username and password when downloading the files.  </p>
<p><strong>UMLS Learning Resources</strong><br />
2018AA <a href="http://www.nlm.nih.gov/research/umls/sourcereleasedocs/index.html">Source Release Documentation</a> Web pages are available.</p>
<p>Additional information regarding the UMLS is available on the <a href="http://www.nlm.nih.gov/research/umls/">UMLS homepage</a>. New users are encouraged to take the <a href="http://www.nlm.nih.gov/research/umls/new_users/online_learning/index.htm">UMLS Basics Tutorial</a> and to explore the <a href="http://www.nlm.nih.gov/research/umls/quickstart.html">UMLS Quick Start Guide</a>, and other training materials.</p>
<p><strong>UMLS Terminology Services (UTS)</strong><br />
The <a href="https://uts.nlm.nih.gov/metathesaurus.html">UTS Metathesaurus Browser</a> and the <a href="https://documentation.uts.nlm.nih.gov/">UTS SOAP API and REST API</a> include the updated release. </p>
<p>In addition, the <a href="https://uts.nlm.nih.gov/snomedctBrowser.html">UTS SNOMED CT Browser</a> now features the March 2018 US Edition of SNOMED CT.</p>
</div>
<p class="articleParagraph">
By
Victoria Wilder<br />
MEDLARS Management Section<br />
</p>
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