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<title>Automated Indexing Implemented for Meeting Abstracts. NLM Technical Bulletin. Sep-Oct 2002</title>
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<meta name="DC.Subject.Keyword" content="Meeting Abstracts" />
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<tr><td width="30"> </td><td width="470"><font size="2"><strong>September 19, 2002</strong> [posted]</font><br /></td><td width="30"> </td></tr>
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<tr><td width="30"> </td><td width="470">
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<tr><td width="30"> </td><td width="470"><font size="5"><strong>Automated Indexing Implemented for Meeting Abstracts</strong></font><br /></td><td width="30"> </td></tr>
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<tr><td width="30"> </td><td width="470">
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he National Library of Medicine (NLM) has had a long-standing interest in automated indexing and
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has conducted research through its project, the <a href="http://ii.nlm.nih.gov">Indexing Initiative</a>.
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The objective of the Indexing Initiative is to investigate methods whereby automated indexing algorithms
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partially or completely substitute for traditional indexing. NLM saw a golden opportunity to apply its
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research to meeting abstracts because they are now grouped in the <a href="http://gateway.nlm.nih.gov">NLM Gateway</a>
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as a result of NLM's reinvention initiatives and they are full text.
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</p>
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<p>
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Historically, NLM has collected and provided selected meeting
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abstracts in electronic format as part of former specialty databases.
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During reinvention, meeting abstracts were converted and added to the NLM Gateway
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where there are now approximately 63,000 meeting abstracts in the areas of HIV/AIDS,
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Health Services Research, and Space Life Sciences.
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</p>
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<p>
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Prior to the retirement of the ELHILL<sup><font size="-2">®</font></sup> mainframe
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retrieval system and the legacy data creation and maintenance systems for the specialty
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databases, indexers assigned Medical Subject Heading (MeSH<sup><font size="-2">®</font></sup>) terms to meeting abstracts.
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Meeting abstracts were last updated with the 2001 MeSH vocabulary in the fall of 2000.
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New meeting abstracts added to the Gateway since that time have not been indexed.
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</p>
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<p>
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The meeting abstracts on HIV/AIDS were divided into two Gateway collections: AIDS Meetings (with MeSH) and
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AIDS Meetings (not indexed with MeSH terms). The abstracts in this latter collection were added
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to the Gateway during the period November 2000 through July 2002. The Health Services Research collection contained
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both MeSH-indexed and non-indexed meeting abstracts. The Space Life Sciences collection contained
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indexed abstracts from professional meetings through 2000.
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</p>
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<p>
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A sample of meeting abstracts was processed through the Medical Text Indexer (MTI)
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automated indexing system, produced by the Indexing Initiative. MTI applies several
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methods of discovering MeSH headings for titles and abstracts and combines them into an
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ordered list of recommended indexing terms. NLM staff reviewed the MTI output for the
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sample, and MTI algorithms were adjusted based on feedback. Through the iterative
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process of output review and algorithm adjustment, the resulting quality of indexing terms
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was greatly improved.
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</p>
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<p>
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NLM decided to use MTI to index meeting abstracts available through the Gateway. MeSH terms will be added when
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a meeting abstract is introduced into the Gateway prospectively. Terms applied will be maintained each
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year in accordance with annual MeSH changes. The terms reside and are displayed in the Keyword field.
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There are no MeSH/subheading combinations, and MTI does not indicate major MeSH topics.
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</p>
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<p>
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For the new version of the Gateway released September 19, 2002, all of the existing meeting
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abstracts in the NLM Gateway were processed by MTI. Automatically-generated MeSH terms were
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added to the Keyword field, and all previously existing MeSH terms and substance names were removed. Gateway search
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translations were adjusted to take advantage of the new Keywords. The AIDS meeting abstracts are now in
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one single collection, AIDS Meetings, because they now share consistent subject analysis
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generated by MTI.
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</p>
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<br /><br />
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<p>
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<!--************************indicate article author and section below*******************************-->
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<strong>By Andrea Demsey</strong><br />
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<strong>MEDLARS Management Section</strong><br />
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<strong>and</strong><br />
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<strong>Sonya Shooshan</strong><br />
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<strong>Lister Hill National Center for Biomedical Communications</strong><br />
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</p>
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<p><strong>Indexing Terms</strong></p>
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<p>Meeting Abstracts, Automated Indexing</p>
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<p>Automated Indexing, Meeting Abstracts</p>
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<p>NLM Gateway, Automated Indexing, Meeting Abstracts</p>
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<p>Indexing Initiative</p>
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<p>Medical Text Indexer</p>
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<p>Indexing, Automated, Meeting Abstracts</p>
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<p>Abstracts, Meeting</p>
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<p>Conference Proceedings Abstracts</p>
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-->
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<img src="/pubs/techbull/new_tb_graphics/black_pixel.gif" width="450" height="1" alt="black line separting article from citation"/>
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<p>
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<em>Demsey A, Shooshan S. Automated Indexing Implemented for Meeting Abstracts. NLM Tech Bull. 2002 Sep-Oct;(328):e2.</em>
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