fn:document-uri in Saxon and XMLSpy

Hi 

In XPath 2.O fn:document-uri returns full path and filename of the input XML
document or context node. In order just to get the filename returned I use
this set of functions in XSLT processor SAXON 8B in oXygen:

subsequence(reverse(tokenize(document-uri(.), "/")), 1, 1)


But I need to use this set of functions in XMLSpy's 2006 XSLT processor:

subsequence(reverse(tokenize(document-uri(.), "\\")), 1, 1)


Who is doing it right and why?

Wouldn't it be better for both processors to make both "/" and "\\" work?

Is there a better set of functions to do the samt thing?
 

Best regards,
Jesper Tverskov