Indicates the root file specification for either the master or
    standby database where you want to start database replication.

                                   NOTE

       Do not include a node name when you specify the database-
       rootfile parameter. This parameter must specify a locally
       accessible database root file; the parameter cannot include
       a remote file specification.

    The following list describes which database root file to specify
    depending on where you enter the command:

    o  When you enter the command, Replicate After_Journal Start
       on the standby node, specify the database root file for the
       Standby database.

    o  When you enter the command, Replicate After_Journal Start on
       the master node, specify the database root file for the Master
       database.

    To ensure that the standby database accesses the correct master
    database as the source of replication operations, include the
    Master_Root qualifier on the command line. Similarly, to ensure
    that the master database accesses the correct standby database
    as the target of replication operations, include the Standby_Root
    qualifier on the command line.

    Reference: See the Master_Root and Standby_Root qualifiers
    discussed in this Help topic.