> I do as well. I've also developed a habit of wrapping such diagnostic output
in a <testDD/>, where DD = the current date. That way I can quickly find both
the diagnostic output and the XSLT code that generated it. Children elements
label individual parts of the output, e.g.,
>

My trick is to put the XSLT line number in the message, which serves the same
purpose.

Michael Kay
Saxonica