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<div class="actions">August 10, 2006 <span class="status">[posted]</span>
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<h1>TOXLINE<span class="registered">&#174;</span> Unified </h1>
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<p class="first">
<span class="initcap">A</span>
new version of the National Library of Medicine<span class="registered">&#174;</span> (NLM) <a href="//toxnet.nlm.nih.gov/cgi-bin/sis/htmlgen?TOXLINE">TOXLINE</a> was released on TOXNET on Tuesday, July 18 (see <a href="#fig1">Figure 1</a>). Search results from the two parts of TOXLINE<span class="registered">&#174;</span>, TOXLINE Core and TOXLINE Special, are now merged. TOXLINE Core was the PubMed<span class="registered">&#174;</span>/MEDLINE<span class="registered">&#174;</span> toxicology subset and TOXLINE Special captured other literature (special journal and other research literature, technical reports and research projects, and archival materials). This change allows all results to be relevancy ranked in the same way, with results displayed in only one window (see <a href="#fig2">Figure 2</a>). A similar merged interface will be provided for the Developmental and Reproductive Toxicology/Environmental Teratology Information Center (<a href="//toxnet.nlm.nih.gov/cgi-bin/sis/htmlgen?DARTETIC">DART<span class="registered">&#174;</span>/ETIC</a>) database in the Fall.
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<p>TOXNET offers features such as relevancy ranking and flexible sorting and downloading options. Relevancy ranking attempts to determine which documents are most pertinent to the search, and to place those documents first in the list of results. The ranking is based upon the number of individual search terms occurring in a document, the number of times each search term occurs in a document, its rarity within the database, and the nearness of search terms to each other. Documents containing combinations of search words tend to be ranked higher than documents having isolated occurrences of the words.
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<strong>Figure 1: New TOXLINE Search Page.</strong>
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alt="Screen capture of results display in TOXLINE."
title="" width="502" height="382" /><br />
<strong>Figure 2: TOXLINE's new merged format for Search Results.</strong>
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<p>
More information about TOXLINE can be found on the <a href="//www.nlm.nih.gov/pubs/factsheets/toxlinfs.html">TOXLINE Fact Sheet</a> or by emailing <a href="mailto:tehip@teh.nlm.nih.gov">tehip@teh.nlm.nih.gov</a>.
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<p class="authors">
By
Colette Hochstein<br />
Division of Specialized Information Services<br />
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<p class="citation">Hochstein C. TOXLINE<span class="registered">&#174;</span> Unified . NLM Tech Bull. 2006 Jul-Aug;(351):e6.</p>
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