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... Registrations for media types created experimentally or as part of
products that are not distributed commercially may be registered in
the personal or vanity tree ...
... IANA may, by
and with the advice and consent of the IESG, create new top-level
registration trees. It is explicitly assumed that these trees may be
...
... top-level
registration trees. It is explicitly assumed that these trees may be
created for external registration and management by well-known ...