A word, phrase, graphic, chemical structure, equation, or other “noun” that is:
<!ELEMENT term (#PCDATA %term-elements;)* >
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Any combination of:
In a definition list:
... <back> <glossary id="bid.1237"> <title>Glossary</title> <def-list> <def-item> <term id="bid.1238">3-D or 3D</term> <def> <p>Three-dimensional.</p> </def> </def-item> <def-item> <term id="bid.1722">Accession number</term> <def> <p>An Accession number is a unique identifier given to a sequence when it is submitted to one of the DNA repositories (GenBank, EMBL, DDBJ). The initial deposition of a sequence record is referred to as version 1. If the sequence is updated, the version number is incremented, but the Accession number will remain constant.</p> </def> </def-item> ... </def-list> </glossary> </back> ...
In a multi-link:
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<sec>
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<p>The <multi-link><term>HNF4A gene</term><ext-link ext-link-type="url"
xlink:href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=PureSearch
&db=books&details_term=HNF4">Bookshelf</ext-link>
<ext-link ext-link-type="url" xlink:href="http://www.ncbi.nlm.nih.gov/entrez/
query.fcgi?cmd=PureSearch&db=pmc&details_term=diabetes%20
AND%20%28HNF4A%29">PubMed Central</ext-link>
<ext-link ext-link-type="url" xlink:href="http://www.ncbi.nlm.nih.gov/entrez/
query.fcgi?cmd=PureSearch&db=PubMed&details_term=diabetes%20
AND%20%28HNF4A%29">PubMed</ext-link>
<ext-link ext-link-type="url" xlink:href="http://www.ncbi.nlm.nih.gov:80/entrez/
dispomim.cgi?id=600281">OMIM</ext-link> <ext-link ext-link-type="url"
xlink:href="http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?db=gene
&cmd=Retrieve&dopt=Graphics&list_uids=3172">Entrez
Gene</ext-link></multi-link> encodes a transcription factor that is
found in the liver and pancreas. HNF4A is found in a region of
chromosome 20 that is linked with type 2 diabetes, and mutations
of this gene cause a rare form of autosomal dominant diabetes
(MODY1).</p>
...</sec>
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