> When I run the same program on a single XML file,
> unparsed-entity-uri() works jsut fine. But when I run it in a 
> batch mode, it returns an empty string.
> 

OK, that's getting us somewhere.

What exactly do you mean by "running it in a batch mode"?

The XML parser you are using, by the way, is the one that comes with the
Java run-time library that you are using. So we may need to know which
version of Java this is. I would like to suggest that you switch from the
built-in XML parser (which has lots of bugs, especially in JDK 6) to Apache
Xerces. You can do that by downloading Apache Xerces and placing the JAR
file in a directory lib/endorsed in your Java installation.

Regards,

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