This specifies the default base directory or name entry to use for the reverse address mapping links to the 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. For example: SET DEFAULT DIRECTORY_SERVICE DECDNS REVERSE_DIR .DNA_BackTranslation For more information, please refer to the NAMES_AND_DIRECTORIES topic.