9.6. Closing or Obsoleting a Registry/Registrations
Sometimes there is a request to "close" a registry to further registrations. When a registry is closed, no further registrations will be accepted. The information in the registry will still be valid and registrations already in the registry can still be updated.
A closed registry can also be marked as "obsolete", as an indication that the information in the registry is no longer in current use.
Specific entries in a registry can be marked as "obsolete" (no longer in use) or "deprecated" (use is not recommended).
Such changes to registries and registered values are subject to normal change controls (see Section 2.3). Any closure, obsolescence, or deprecation serves to annotate the registry involved; the information in the registry remains there for informational and historic purposes.