> I don't need to 
> decide between a processor-specific extension,

Note that it's fairly easy to write multiple-output stylesheets that
work on a range of processors by using a named template that
uses an xsl:choose with element-available or an xsl:fallback
cascade that outputs the stuff using whatever is there.

see for example norm's version in the docbook sheets

http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/docbook/xsl/html/chunker.xsl?rev=1.22&content-type=text/vnd.viewcvs-markup

which seems to have grown since last time I looked at it and now

<!-- This stylesheet works with XSLT implementations that support -->
<!-- exsl:document, saxon:output, or xalanredirect:write -->

David


________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________

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