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In today's digital society, information systems play an important role in many organizations. While their construction is a well understood software engineering process, it still requires much engineering effort. The de facto storage mechanism in information systems is the relational database. Although the representation of data in these databases is optimized for efficient storage, it is less suitable for use in the software components that manipulate the data. Therefore, much of the construction of an information system consists of programming translations between the database and a more convenient representation in the software.
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