XML Pipeline

["Stephen E. Beller" <sbeller@nhds.com>]

I have the need to pass a data file sequentially through a "pipeline" of
users. Each user must render the contents from the file received, add and/or
modify certain data elements specific to that user, and then pass the file
to next person in the pipeline who must do the same, etc. 

Along the way, any additions and modifications must be tracked for auditing
purposes. 

At the end of pipeline the data file (with all the additions, modifications
and audit information) must be rendered.

Can this be done effectively using XML?

Steve