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   "DNAME can also be useful in other situations, such as when an
   organizational unit is renamed."

and section 5 begins like this:

   5.  Examples of Use

   5.1.  Organizational Renaming

> ... But seeing the RFC
> it looks like it might be usable.  The issue is whether it will load in
> the root zone, and not just a label name.  I'll have to give it a try tonight.

You don't mean "the root zone".  You might mean "at the root of a zone"
or "the zone root".  Let us know how it goes.  So far as I can tell
DNAME is not widely deployed and it would be interesting to ask people
to check if the DNAMing works for them.

Sam