Thank you again so very much for your response and info, Mark.
Unless I really misunderstood the usage of ContentNegotiatingsViewResolver and JsonView objects (if so, please straighten me out), these mechanisms are still only allowing one Response back (i.e. either this View, that View, writing to stream, or pass void to indicate that the Request has been taken care of ....and such).
I am however, trying to find out how to indicate in (return from) the Controller in order to display the data in a particular View as what I do most of the time
AND at the same juncture to have the HTTP Response message sent back to the Requestor with XML data.
Hope I am making sense
Any info and ideas will be greatly appreciated.