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Towards multi-level and modular conceptual schema specifications
1984
Information Systems
The specification of the conceptual schema for a data base application is divided into levels. It is argued that, at the highest level, a direct description of the characteristics of the information kept in a data base and of the constraints governing their existence and transformation of its components characterizes what a particular data base is in a more fundamental way (hence at a higher and more stable level) than the operations that happen to be used for data base manipulation. At a next
doi:10.1016/0306-4379(84)90015-2
fatcat:y6yxh7jxtrhthbuzbfv73nzjz4