> How to debug stylesheet for checking value of 
> variables,params(like 'printf' statements in C)?
> I tried using '<xsl:message>',but that message was not 
> displayed even though it was in the code flow.

xsl:message is the usual way, but where the output goes depends on your
processing environment.

If you're running in the browser, then the first rule is: don't try to debug
by running in the browser.

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