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# Data Storage Schema

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Your data storage schema refers to the design that you implement to organize the persistent data in your application. This schema refers to the data itself–not the actual data source (such as a relational database or nonrelational legacy system).

During the design phase of the TopLink application development process (see "Typical Development Stages"), you should decide how to implement the classes in the data source. When integrating existing data source information, you must determine how the classes relate to the existing data. If no legacy information exists to integrate, decide how you will store each class, then create the necessary schema.

You can also use TopLink Workbench (see Using TopLink Workbench) or database schema manager (see Using the Schema Manager) to create the necessary information.