Starting in the 12c (12.1.1) release of WebLogic Server Oracle TopLink is the default JPA and JAXB provider.
The TopLink versions that are listed are the minimum required for the listed application server versions. Oracle recommends you always install the latest patch set. Patch sets are available from metalink.oracle.com.
As of WebLogic 9.0 Oracle TopLink no longer supports EJB 2.1 CMP. We recommend migrating to a TopLink JPA architetcure to continue leveraging the benefits of TopLink within WebLogic.