Extending the E/R Model for the Multidimensional Paradigm
نویسندگان
چکیده
Multidimensional data modeling plays a key role in the design of a data warehouse. We argue that the Entity Relationship Model is not suited for multidimensional conceptual modeling because the semantics of the main characteristics of the paradigm cannot be adequately represented. Consequently, we present a specialization of the E/R model called Multidimensional Entity Relationship (ME/R) Model – that is suitable for the conceptual modeling of OLAP applications. In order to express the multidimensional structure of the data we define two specialized relationship sets and a specialized entity set. The resulting ME/R model allows the adequate conceptual representation of the multidimensional data view inherent to OLAP, namely the separation of qualifying and quantifying data and the complex structure of dimensions. We demonstrate the usability of the ME/R model by an example taken from an actual project dealing with the analysis of vehicle repairs.
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تاریخ انتشار 1998