Specifies that Replication Option create an extraction
    database at the target site. Because each extraction database
    is independent of the source database, users at the target
    directory can access extraction databases with read/write as
    well as read-only transactions. Each time an extraction mode
    transfer executes, Replication Option creates a new version of
    the target database and transfers a complete copy of the selected
    records to the target node.

    Indexes, constraints, and access rights are not transferred
    when the target database is created. Similarly, primary key
    and foreign key attributes for a particular relation are
    not transferred because key attributes are implemented as
    constraints. Once the target database has been created, you can
    define indexes, constraints, and triggers for it and modify the
    access rights.