Which processor are you using? Some processors will give you an execution trace.

2008/5/22 Peter Hickman <peter@xxxxxxxxxxxxx>:
> I have a lot of data and some stylesheets which have /evolved/ over
> time. I suspect that the quite a bit of the code is not ever being
> executed, is there some way of finding the parts of the stylesheet that
> is never accessed other than embeding xsl:message everywhere?