Extensions

Mike Brown

> is it possible to use "external helper modules" within
> an XSL document to perform specific processing?

This is the subject of extension functions and extension
elements, defined in section 14 of the August working draft:
http://www.w3.org/TR/xslt#extension

James Clark's XT is an XSL processor that implements the
working draft using Java. I would point you to the extension
function examples on his XT page at
http://www.jclark.com/xml/xt.html but it seems to have gone
missing!

Michael Kay's SAXON is an XSL processor that implements
extension functions in a similar, yet slightly different,
way.  http://users.iclway.co.uk/mhkay/saxon/ (read the XSL
Conformance page).