table: general template

hello all,

this is a bridge probably thousands have crossed already, so I'd be
glad for a direction...

i need to make a html table

<table>
<tr>
<th>some header from the local-name()</th>
...
</tr>
<tr>
<td>some data matching the header</td>
...
</tr>
...
</table>

This would be easy, if i knew the elements I will get, but instead of
this I have:

<log>
<entry>
  <a>foo</a>
  <b>foo</b>
</entry>
<entry>
  <a>foo</a>
  <b>foo</b>
  <c>foo</c>
</entry>
<entry>
  <x>foo</x>
  <b>foo</b>
</entry>
</log>

so all a's get into the a column, b's in the b columns, and if there
is no c in an entry, it should make a blank <td>

any links? ideas?

thanks a lot!
-- 
Jan
http://www.limpens.com