This function extracts node registration information for some set of nodes
 and writes it to a text file.  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.