You can replicate to an Oracle data server, using either ECDA Option for Oracle database gateway or ExpressConnect for Oracle.
The ECDA Option for Oracle accepts commands from the replicate Replication Server, and applies those commands to an Oracle database.
ExpressConnect for Oracle, which provides direct communication between Replication Server and the replicate data server. ExpressConnect for Oracle eliminates the need for installing and setting up a separate gateway server, and makes Oracle data easily accessible in a heterogeneous replication environment.