<table frame="box" xmlns="http://my.cals.ns">
  <tgroup cols="2" colsep="0" rowsep="1">
    <colspec colnum="1" colname="c1"/>
    <colspec colnum="2" colname="c2"/>
    <colspec colnum="3" colname="c3"/>
    <thead>
      <row><entry/><entry>k</entry><entry>unit</entry></row>
    </thead>
    <tbody>
      <row><entry>Meter</entry><entry>km</entry><entry>m</entry></row>
      <row><entry>Liter</entry><entry>KL</entry><entry>L</entry></row>
      <row><entry>Gram</entry><entry>Kg</entry><entry>g</entry></row>
    </tbody>
  </tgroup>
</table>
