Extract node registration information for some set of nodes and write it
 to a text file.

     EXPORT [DECNET] NODE node-id  FILE data-file-name
         [ DIRECTORY_SERVICE dir-service ]
         [ PHASEIV_PREFIX addr-prefix ]
         [ REVERSE_DIRECTORY rev-dir-name ]
         [ SYNONYM_DIRECTORY syn-dir-name ]
         [ NSAP_FORMAT addr-format ]

 Once the information has been exported, it can be:

  - Used for reporting or database maintenance purposes.

  - Used to make network-wide changes, such as modifying the NSAP IDP
    value, by editing the text file and using the MODIFY feature of the
    IMPORT command.

  - Used to move node information from one directory service to another,
    using the REGISTER, UPDATE, or REPLACE features of the IMPORT command.

  - Used to verify that the addressing information in one directory
    service is the same as in another directory service, using the VERIFY
    feature of the IMPORT command.

  - Used to remove node information from a directory service, using the
    DEREGISTER feature of the IMPORT command.