Replication Agent for Oracle includes several enhancements in version 15.7.1
SP200.
Support for Oracle 12c
Replication for Oracle 15.7.1 SP200 now supports Oracle 12c database at the same functional level of Oracle 11g.
DDL Replication Using XStream APIs
The Replication Agent for Oracle Log Reader now supports data definition language (DDL) statements only in an Oracle-to-Oracle replication environment using XStream APIs.