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# Object-Relational Object Array Mapping

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In an object-relational data model, structures can contain arrays (collections of other data types). These arrays can contain primitive data types or collections of other structures.

TopLink maps arrays of structures with the `ObjectArrayMapping` class. An object array mapping defines a collection-aggregated relationship, in which the target objects share the same row as the source object.

You must associate this mapping to an attribute in the parent class.

See "Configuring an Object-Relational Object Array Mapping" for more information.