Specifies whether the exported format of the database is
    compatible with a pre-Version 3.0 Oracle Rdb database (WITH
    NOEXTENSIONS), or with an Oracle Rdb database created with Version
    3.0 Oracle Rdb software or higher (WITH EXTENSIONS). The default is
    WITH EXTENSIONS. The WITH EXTENSIONS option also directs Oracle Rdb
    to preserve other parameters about the physical structure of
    the exported database. Use WITH NOEXTENSIONS when you export
    a database that you plan to import on pre-Version 3.0 Oracle Rdb
    software.

    When you specify the WITH NOEXTENSIONS option, null flags for
    missing value fields are not exported, therefore numeric missing
    values are replaced by zeros and character missing values are
    replaced by blanks.

    Note also that when you specify the WITH NOEXTENSIONS option,
    features of Version 3.0 and higher Oracle Rdb databases are not
    exported. Storage maps, triggers, and collating sequences, for
    example, are not backed up when you specify the WITH NOEXTENSIONS
    option.

    The WITH NOEXTENSIONS option is not compatible with data
    dictionary databases (CDD$DATABASE.RDB). If you attempt to export
    a CDD$DATABASE.RDB database, RDO issues an error message stating
    that the NOEXTENSIONS option is not valid for data dictionary
    databases.