[xsl] XHTML -to- WIKI ... so close ... yet not close enough

[Alan Williamson <alan@xxxxxxxxxxxxx>]

Morning one and all.

I am wishing to take XHTML to Wiki format.  The Wiki format is 
relatively straight forward with no major complications.  I have written 
most of the XSLT file but I am having problems (fun?) with working with 
embedded lists.

For example:

------ XHMTL -------------
<ul>
  <li>Element1</li>
  <li>Element2
    <ul>
       <li>Element2.1
         <ul>
           <li>Element2.1.1</li>
         </ul>
       </li>
    </ul>
  </li>
  <li>Element 3</li>
</ul>
-------------------------

Should be converted to:

------ WIKI -------------

- Element1
- Element2
-- Element2.1
--- Element2.1.1
- Element3

-------------------------

I just can't seem to get the [--] to count along properly; i have it 
instead just rendering it all as [-] elements.

Any help along these lines would be much appreciated.

thanks

alan