RenderX XEP issue

Hi,

I installed RenderX and found XEP Assistant when i hit x4u.bat file. We can
select XML and XSL file and based on that we can generate PDF. but if i
want to edit the XML or XSL where and what functionality is available in
RenderX. How to write XML or XSL/XSLFO code in RenderX

And, how to run and what is the process for XEP.bat file for any XML or
XSL. Please explain with example


Thanks,
Rahul