> What kind of object is passed if I want to pass a the current 
> node that matches the template to the extension function? 
> Currently the existing java class that i plan on using 
> expects a File object.

In the case of Saxon, the object will be an instance of Saxon's NodeInfo
interface, unless the actual tree is a JDOM/DOM/XOM/DOM4J tree and the
function expects a JDOM/DOM/XOM/DOM4J node, in which case the underlying
node will be passed.

If you're expecting a File, then you're probably expecting to parse the XML.
That's obviuosly unnecessary in this environment as the XML is already in
tree form.

Michael Kay
http://www.saxonica.com/