The heading information for a group of columns (<oasis:tgroup>). A simple table that has only one <oasis:tgroup> will have only one <oasis:thead> which will serve as the header for the table. More complex tables may have a <oasis:thead> for each <oasis:tgroup>.
A table may be divided into header elements (<oasis:thead>) and table body elements (<oasis:tbody>). Table headers may print or display in a different font or with a different alignment than the table body cells. Typically, the content of the <oasis:thead> appears at the top of the table group, and it may appear again at the top of any physical break in rows in the body, for example, at the top of each page of a multi-page <oasis:tgroup>.
The official OASIS Exchange CALS Table Model documentation can be found at http://www.oasis-open.org/specs/a502.htm
<!ELEMENT oasis:thead (oasis:row+)>
Table Row (OASIS Table Model) <oasis:row>, one or more
...
<table-wrap id="TN0.170">
<label>Table</label>
<caption>
<p>Numbers of patients receiving institutional
care at the end of scheduled follow up and
use of hospital beds among those allocated
to day hospital or alternative services</p>
</caption>
<oasis:table>
<oasis:tgroup cols="7">
<oasis:colspec colnum="1" colname="col1" align="center" colsep="1"/>
<oasis:colspec colnum="2" colname="col2" align="center" colsep="1"/>
<oasis:colspec colnum="3" colname="col3" align="center" colsep="1"/>
<oasis:colspec colnum="4" colname="col4" align="center" colsep="1"/>
<oasis:colspec colnum="5" colname="col5" align="center" colsep="1"/>
<oasis:colspec colnum="6" colname="col6" align="center" colsep="1"/>
<oasis:colspec colnum="7" colname="col7" align="char"
charoff="30" char="." colsep="1"/>
<oasis:thead>
<oasis:row>
<oasis:entry namest="2" nameend="4" align="center"
morerows="1">Institutional care</oasis:entry>
<oasis:entry namest="6" nameend="7" align="center"
morerows="1"> Bed use (days)</oasis:entry>
</oasis:row>
<oasis:row>
<oasis:entry namest="col3" nameend="col5"><hr/></oasis:entry>
<oasis:entry namest="col6" nameend="col7"><hr/></oasis:entry>
</oasis:row>
<oasis:row><oasis:entry>Control group</oasis:entry>
<oasis:entry align="center">Day hospital</oasis:entry>
<oasis:entry align="center">Control</oasis:entry>
<oasis:entry align="center">Odds ratio (95% CI)</oasis:entry>
<oasis:entry></oasis:entry>
<oasis:entry></oasis:entry>
<oasis:entry align="center">Day hospital</oasis:entry>
<oasis:entry align="center">Control</oasis:entry>
</oasis:row>
</oasis:thead>
<oasis:tbody>
<oasis:row>
<oasis:entry namest="1" nameend="7"><hr/></oasis:entry></oasis:row>
<oasis:row>
<oasis:entry>Comprehensive care (5 trials)</oasis:entry>
<oasis:entry align="center">151/597<xref ref-type="table-fn"
rid="TF1-150"></xref></oasis:entry>
<oasis:entry align="center">159/584</oasis:entry>
<oasis:entry align="center">0.91 (0.70 to 1.19)</oasis:entry>
<oasis:entry></oasis:entry>
<oasis:entry align="center">20.5</oasis:entry>
<oasis:entry align="char" char="." charoff="30">21.4</oasis:entry></oasis:row>
<oasis:row>
<oasis:entry>Domiciliary care (4 trials)</oasis:entry>
<oasis:entry align="center">20/216</oasis:entry>
<oasis:entry align="center"> 19/227</oasis:entry>
<oasis:entry align="center">1.61 (0.30 to 8.55)</oasis:entry>
<oasis:entry></oasis:entry>
<oasis:entry align="center"> 7.7</oasis:entry>
<oasis:entry align="char" char="." charoff="30">11.1</oasis:entry>
</oasis:row>
<oasis:row>
<oasis:entry>No comprehensive care (3 trials)</oasis:entry>
<oasis:entry align="center">37/411</oasis:entry>
<oasis:entry align="center"> 66/403</oasis:entry>
<oasis:entry align="center">0.50<xref ref-type="table-fn"
rid="TF1-151"></xref> (0.26 to 0.96)</oasis:entry>
<oasis:entry></oasis:entry>
<oasis:entry align="center">11.2</oasis:entry>
<oasis:entry align="char" char="." charoff="30">11.7</oasis:entry>
</oasis:row>
<oasis:row>
<oasis:entry>Total</oasis:entry>
<oasis:entry align="center">208/1224</oasis:entry>
<oasis:entry align="center">244/1214</oasis:entry>
<oasis:entry align="center">0.77 (0.52 to 1.13)</oasis:entry>
<oasis:entry></oasis:entry>
<oasis:entry align="center">15.0</oasis:entry>
<oasis:entry align="char" char="." charoff="30">16.4</oasis:entry>
</oasis:row>
</oasis:tbody>
</oasis:tgroup>
</oasis:table>
<table-wrap-foot>
<fn id="TF1-150"><p>Data not available for 1 trial.</p>
</fn>
<fn id="TF1-151"><p>P<0.05 (random effects
model).</p>
</fn>
</table-wrap-foot>
</table-wrap>
...
oasis-exchange.ent