> I've got a stylesheet that produces different results depending on 
> whether I use "A != B" or "not(A = B)"?  Is this supposed to happen?  
> Can someone explain why?  It's not very intuitive.

When A and B are node-sets, 

  A != B 
means
  some $a in A, $b in B satisfies $a != $b

while
  not( A = B )
means
  not( some $a in A, $b in B satisfies $a = $b )

(the expansions, by the way, are legal XPath 2.0 expressions)

Michael Kay
Software AG
home: Michael.H.Kay@xxxxxxxxxxxx
work: Michael.Kay@xxxxxxxxxxxxxx 
 

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