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=== Data layer ===
The data layer is responsible for database access, storage and providing a common data interface to the business layer. Data is accessed not in [[Object-oriented programming|object oriented]] fashion but in a [[Relational database|relational]] way. Each [[Entity class|entity]] (represented as a row in the database) is provided to the business layer as a set of generic values. A generic value is not typed, so fields of an entity are accessed by the [[Column (database)|column]] name.
=== Key integrations ===
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