> It's not that. I would like to load all the nodes from "b.xml"
> and then after some operation, I would like to remove the same nodes
> which was added from "b.xml".

XSLT never changes its input tree it has a read-inly model.
An XML tree is input, and a new XMl tree is generated as the result It
iis not possible to either add or remove nodes.

David