SoftLiban KEYROUZ Charbel wrote:
> 
>   <xsl:sort data-type="number" select="{$sortBy}"/>

This question was actually asked just a couple of days ago.
The short answer is you can't do this, but some possible
approaches that might solve your problem are proposed in
that thread.

http://www.mulberrytech.com/xsl/xsl-list/archive/msg14124.html

Hope this helps.

-- 
Warren Hedley


 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list