I do not want to do this in a stylesheet...

What I need to do is.

a) Have a list of optional attributes for a Web Service request stored
as a list in a GCV. (I will have muiple GCV for the different
requests)
b) At the end of the Subsbscriber Event Transform, have some code
that:

i) Goes through each attribute in the GCV
ii) Checks if it an operation attribute (it doesn't matter if it is an
empty string)
iii) If it is not an operation attribute, create a destination
attribute for the current operation, for the class user, with the name
from the GCV and a string value of

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"

This is a result of last miinute WSDL changes by a client and I know
XPath will be in the solution somewhere and that is one area I know
little about....