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A data model is a structured description of a set of data and its relationships, which represent the business of an organization. A data model bears the same relation to the organization it models as a map does to the terrain it represents.
A data model does not comprise in itself the true structure of an organization's business, but rather an acceptably simplified view of it. This structure may be subjected to certain stringent tests to verify that it can be considered an efficient, self-contained system.
Your data model should be comprehensive and consistent in order to accurately reflect the data and data interconnections of the organization your application supports.
A properly defined and structured data model helps you design a correct database, which is essential to the successful implementation of your application system.
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