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A data model is the heart and soul of our applications. A good data model provides afoundation for efficient data entry and retrieval. It also needs to be consistent withother models, at least in your organization, and needs to accurately capture the appropriatebusiness requirements. Agood data model must enable an application to expandand evolve gracefully to support changing business requirements. Despite thehigh value attributed to the data model, I am still amazed at how often we give little
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