Heading over the second column (the definition column) of a definition list (two-part list).
The <def-list> element should not be used to tag the formal terms and definitions provided in section 3 of many International Standards, or corresponding terms and definitions clauses in other documents. Such terms and definitions sections should be marked up using <term-sec> and the individual definitions should normally be marked up using <tbx:termEntry>.
See the separate documentation for a full description of the use of <tbx:termEntry>.
Any combination of:
...
<back>
...
<glossary>
<def-list>
<title>ABBREVIATIONS</title>
<term-head>Abbreviation</term-head>
<def-head>Expansion</def-head>
<def-item><term id="G1">PAP I</term>
<def><p>poly(A)polymerase I</p></def>
</def-item>
<def-item><term id="G2">PNPase</term>
<def><p>polynucleotide phosphorylase</p></def>
</def-item>
</def-list>
</glossary>
</back>
...
JATS-list0.ent