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

     REVERSE_DIRECTORY rev-dir-name

 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 reverse address directory name defined in the
 export file is used.  If the export file does not contain a reverse
 address directory name definition for the target directory service,
 then the reverse directory name set using the SET DEFAULT command is
 used.

 For more information, please refer to the NAMES_AND_DIRECTORIES topic.
 See the EXPORT_FILE topic for a description of the reverse address
 directory control line.