I\'m writing some xlst file which I want to use under linux and Windows. In this file I use node-set function which declared in different namespaces for MSXML and xsltproc
Firefox 3 implements node-set (as part of the EXSLT 2.0 namespace improvements) in it's client-side XSLT processing.
Maybe not quite the answer you were looking for - but it could be, depending on the context of your problem. ;-)