Creates a transfer definition and stores it in the transfer
    database. A transfer definition contains all the information
    necessary to select a set of records from the source database
    and to define a target database. A transfer definition also can
    contain the views to be defined on the target database and the
    command procedures to be executed before and after the execution
    of the transfer.

    A source database for extraction transfers can be Oracle Rdb, or
    a database accessed through one of the Rdb Transparent Gateways.
    For replication transfers, the source database must be an Oracle Rdb
    database.

                                   NOTE

       The DEFINE TRANSFER statement, unlike the SQL CREATE
       TRANSFER statement, cannot be used to define transfers
       to existing databases (including replication transfers
       with the NO DELETE attribute). It also does not provide
       a checkpoint clause. Furthermore, unlike the SQL CREATE
       TRANSFER statement, the RDO utility does not support the
       MIA character set attributes. It is possible to create a
       transfer definition using RDO and name a database containing
       MIA features. However, the character set attributes of the
       resulting target database might not be correct.

       Use of RDO is recommended only when you want to manipulate
       databases that use only the DEC_MCS character set for
       text data.