690 lines
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690 lines
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<title>The Norm Program </title>
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<link rel="schema.DC" href="http://purl.org/dc/elements/1.1/" title="The Dublin Core metadata Element Set" />
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<meta name="DC.Title" content="The Norm Program " />
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<h4 class="margin-bottom-0">Unified Medical Language System<small><sup>®</sup></small> (UMLS<small><sup>®</sup></small>)</h4>
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<div class="float-right margin-top-05">
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<a class="text-white" href="/research/umls/faq_main.html">FAQ</a>
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<li class="has-children"><div class="acnav__label"> <i class="arrow down"></i><a class="notactive" href="/research/umls/new_users/online_learning/OVR_001.html"> Overview </a></div><ul class="acnav__list acnav__list--level2" style="list-style-type: none; display: none;"><li class="li nav-item"><a class="notactive nav-link link10112" href="/research/umls/new_users/online_learning/OVR_002.html">The Metathesaurus </a></li><li class="li nav-item"><a class="notactive nav-link link10123" href="/research/umls/new_users/online_learning/OVR_003.html">The Semantic Network</a></li><li class="li nav-item"><a class="notactive nav-link link10134" href="/research/umls/new_users/online_learning/OVR_004.html">SPECIALIST Lexicon and Lexical Tools </a></li><li class="li nav-item"><a class="notactive nav-link link10145" href="/research/umls/new_users/online_learning/OVR_005.html">The UMLS License Agreement </a></li><li class="li nav-item"><a class="notactive nav-link link10156" href="/research/umls/new_users/online_learning/OVR_006.html">The UMLS License Agreement Appendix 2 -- SNOMED CT Affiliate Licence Agreement </a></li></ul></li><li class="has-children"><div class="acnav__label"> <i class="arrow down"></i><a class="notactive" href="/research/umls/new_users/online_learning/Meta_001.html"> Metathesaurus </a></div><ul class="acnav__list acnav__list--level2" style="list-style-type: none; 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display: none;"><li class="li nav-item"><a class="notactive nav-link link1031114" href="/research/umls/new_users/online_learning/SEM_002.html">Identifiers in the Semantic Network </a></li><li class="li nav-item"><a class="notactive nav-link link1031215" href="/research/umls/new_users/online_learning/SEM_003.html">Semantic Types</a></li><li class="li nav-item"><a class="notactive nav-link link1031316" href="/research/umls/new_users/online_learning/SEM_004.html">Semantic Relationships</a></li><li class="li nav-item"><a class="notactive nav-link link1031417" href="/research/umls/new_users/online_learning/SEM_005.html">Semantic Relationships at the Concept Level </a></li><li class="li nav-item"><a class="notactive nav-link link1031518" href="/research/umls/new_users/online_learning/SEM_006.html">Parent - Child (broader/narrower) Relationships </a></li></ul></li><li class="has-children is-open"><div class="acnav__label"> <i class="arrow down"></i><a class="notactive" href="/research/umls/new_users/online_learning/LEX_001.html"> Lexical Tools </a></div><ul class="acnav__list acnav__list--level2" style="list-style-type: none; display: block;"><li class="li nav-item"><a class="notactive nav-link link1041620" href="/research/umls/new_users/online_learning/LEX_002.html">Lexical Entries</a></li><li class="li nav-item"><a class="notactive nav-link link1041721" href="/research/umls/new_users/online_learning/LEX_003.html">The Lexical Tools</a></li><li class="li nav-item"><a class="notactive nav-link link1041822" href="/research/umls/new_users/online_learning/LEX_004.html">Lexical Variant Generation (LVG)</a></li><li class="li nav-item"><a class="active nav-link link1041923" href="/research/umls/new_users/online_learning/LEX_005.html">The Norm Program</a></li><li class="li nav-item"><a class="notactive nav-link link1042024" href="/research/umls/new_users/online_learning/LEX_006.html">The Word Index Generator - Wordind</a></li></ul></li><li class="has-children"><div class="acnav__label"> <i class="arrow down"></i><a class="notactive" href="/research/umls/new_users/online_learning/UMLST_001.html"> UMLS Tools </a></div><ul class="acnav__list acnav__list--level2" style="list-style-type: none; 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<div class="tablet:grid-col-9">
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<div class="grid-row">
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<div class="desktop:grid-col-8 tablet:grid-col-12">
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<h1>The Norm Program </h1>
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</div>
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</div>
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<p> The lexical program, <strong>Norm,</strong> generates the normalized strings for terms included in the SPECIALIST Lexicon. The normalization process involves stripping possessives, replacing punctuation with spaces, removing stop words such as "No Other Specification" or NOS, lower-casing each word, breaking a string into its constituent words, and sorting the words in alphabetic order. </p>
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<p> Below is an example of the normalization process for the term Hodgkin's diseases, NOS.</p>
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||
<table>
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<thead>
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<tr><th>Process</th><th>Outcome</th></tr>
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</thead>
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<tbody>
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<tr>
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<td> Remove genitive </td>
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<td> Hodgkin diseases, NOS </td>
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</tr>
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<tr>
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<td> Remove stop words </td>
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<td> Hodgkin diseases, </td>
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</tr>
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<tr>
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<td> Lowercase </td>
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<td> hodgkin diseases, </td>
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</tr>
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<tr>
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<td> Strip punctuation </td>
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<td> hodgkin diseases </td>
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</tr>
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<tr>
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<td> Uninflect </td>
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<td> hodgkin disease </td>
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</tr>
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<tr>
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<td> Sort words </td>
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<td> disease hodgkin </td>
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</tr>
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</tbody>
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</table>
|
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<p> </p>
|
||
<p>The Norm program is used in systems to: </p>
|
||
<ul>
|
||
<li> Find similar terms </li>
|
||
<li> Map terms to UMLS concepts </li>
|
||
<li> Find lexical variants for a term </li>
|
||
</ul>
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||
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<p><a href="https://lhncbc.nlm.nih.gov/LSG/index.html">Download Lexical Tools, including the Norm program</a></p>
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<p class=”margin-top-5”><small>Last Reviewed: July 29, 2016</small></p>
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