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Definition of "Conceptual Level" |
The middle level in the three-level architecture is a conceptual level, which is also referred to as logical vie level. It describes the entire structure of database such as entities, attributes, data types, relationships, constraints, and user operations. It hides the details of physical storage structures. The conceptual view level supports the external view level to present the data to end-users as they need. This view is relatively constant and the Database Administrator designs it after determining the present and future information needs of the organization. However, to expand the conceptual view, the Database Administrator adds the new objects to fulfill the requirements of the organization, without affecting the external view. |
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