This specifies the base directory or name entry to use when repairing
 the reverse address mapping links (also called back translation links).

     REVERSE_DIRECTORY rev-dir-name

 This argument is not used when repairing the Local Naming Database.  It
 is used only for DECdns.

 The links under this directory are used to map NSAP values to their
 respective node names.  These directories are used only for the DECdns
 directory service.

 If not specified, the default reverse directory is used.  This default
 can be displayed or changed using the SHOW or SET DEFAULT commands.

 For more information, please refer to the NAMES_AND_DIRECTORIES topic.