This specifies the directory service that contains the node whose links
 are to be repaired.

     DIRECTORY_SERVICE dir-service

 The service must be one of:

     DIRECTORY_SERVICE LOCAL
     DIRECTORY_SERVICE DECDNS

 The Phase IV database does not require or use synonym or reverse
 address mapping links.  This command does not apply to this directory
 service.

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