In 2.0

test="$A/ancestor::node() intersect $B"

In 1.0

test="count($A/ancestor::node() | $B) = count($A/ancestor::node())"

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

> -----Original Message-----
> From: Wolfgang Jeltsch [mailto:wolfgang@xxxxxxxxxxx] 
> Sent: 14 September 2006 17:16
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  testing relationships between nodes
> 
> Hello,
> 
> alas, I cannot see any way to check whether a given node is 
> an ancestor of a given other node in XPath.  How do I do this?
> 
> Best wishes,
> Wolfgang