DBMS_DEFER_SYS subprograms manage default replication node lists. This package is the system administrator interface to a replicated transactional deferred remote procedure call facility. Administrators and replication daemons can execute transactions queued for remote nodes using this facility, and administrators can control the nodes to which remote calls are destined.
For a complete description of this package within the context of Replication, see
DBMS_DEFER_SYS in the Oracle Database Advanced Replication Management API Reference.