<informaltable>
<!-- Table with no specifed column widths -->
<tgroup cols="5" colsep="1" rowsep="1" align="left">
<colspec colname="c1"/>
<colspec align="left"/>
<colspec align="right"/>
<colspec align="center"/>
<colspec align="center"/>
<thead>
<row>
<entry>Column 1</entry>
<entry>Column 2</entry>
<entry>Column 3</entry>
<entry>Column 4</entry>
<entry>Column 5</entry>
</row>
</thead>
<tbody>
<row>
<entry align="center" valign="top">left aligned
</entry><entry align="center" valign="top">left aligned
</entry><entry align="center" valign="top">right aligned
</entry><entry align="center" valign="top">centered cell
</entry><entry align="center" valign="top">centered
</entry></row>
<row>
<entry align="center" valign="top">no specified width
</entry><entry align="center" valign="top">idem 
</entry><entry align="center" valign="top">idem
</entry><entry align="center" valign="top">idem
</entry><entry align="center" valign="top">idem
</entry></row>
</tbody>
</tgroup>
</informaltable>