Although subscriptions are not used in replicating from the active to the standby database, you can:
Create subscriptions for the data in a logical primary database, or
Create subscriptions in order to replicate data from other databases into a logical replicate database.
The create subscription and define subscription commands use the logical database and data server names instead of the physical names.
See “Warm standby applications using replication” for more information about warm standby applications for a primary or replicate database. Also see Chapter 11, “Managing Subscriptions” in the Replication Server Administration Guide Volume 1 for more information about subscriptions and subscription materialization.