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# Creating a Project by Migrating an EAR to OC4J

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If you configure TopLink to be the default persistence for your application server, TopLink provides automated support for migrating your existing J2EE CMP application server-specific `ejb-jar.xml` file to the required `toplink-ejb-jar.xml` file, including providing an appropriate TopLink Workbench project.

This procedure applies to CMP relational projects only.

For more information, see "Persistence Manager Migration".