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# Mappings

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TopLink uses the metadata produced by TopLink Workbench (see "Understanding TopLink Metadata") to describe how objects and beans map to the data source. This approach isolates persistence information from the object model–you are free to design their ideal object model, and DBAs are free to design their ideal schema.

You use TopLink Workbench to create and manage the mapping information. At run time, TopLink uses the metadata to seamlessly and dynamically interact with the data source, as required by the application.

TopLink provides an extensive mapping hierarchy that supports the wide variety of data types and references that an object model might contain. For more information, see Understanding Mappings.