> Now I'm glad it works, but for some peace of mind I would 
> like to know why 
> <xsl:when test="customer = preceding::row[position()=1]/customer"> 
> behaves as it does?

To paraphrase this XPath expression, it tests whether a <customer> child of
the current node (a <row> element) has the same string value as a <customer>
child of the immediately preceding <row> element, in document order.

Mike Kay


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