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UML and Data Modeling: A Reconciliation by David Hay

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This architectural model can then be converted to a logical data model that more closely reflects the technology of database management. This is the Row Four model, of which there are numerous kinds: This can be relational tables and columns, object-oriented classes, XML Schema tags, or whatever.

Each of the elements shown on the figure has a different view of the world. Not only does the architect see the world differently from the designers, but object-oriented designers see the world quite differently from the relational database designers.

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