The code looks good to me - any chance of seeing the input, transform
and results?

Francis.

Gavin Bong wrote:
> 
> <xsl:variable name="A" select="/dept/person[@dept_id = 1]" />
> <xsl:variable name="B" select="/dept/person[smoker = 'yes']" />
> 
> <xsl:variable name="intersect" select="$A [count(.|$B) = count($B)]"/>
> 
> I tried this on MSXML3 final and Xalan and it did not
> produce the expected intersection. Is there something wrong with the
> xpath ? Michael? Anyone?
>

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