Reconciling requirement-driven data
نویسندگان
چکیده
9 Successful data warehouse (DW) design needs to be based upon a requirement 10 analysis phase in order to adequately represent the information needs of DW users. 11 Moreover, since the DW integrates the information provided by data sources, it is 12 also crucial to take these sources into account throughout the development process 13 to obtain a consistent reconciliation of data sources and information needs. In this 14 paper, we start by summarizing our approach to specify user requirements for data 15 warehouses and to obtain a conceptual multidimensional model capturing these re16 quirements. Then, we make use of the multidimensional normal forms to define a 17 set of Query/View/Transformation (QVT) relations to assure that the conceptual 18 multidimensional model obtained from user requirements agrees with the available 19 data sources that will populate the DW. Thus, we propose a hybrid approach to de20 velop DWs, i.e., we firstly obtain the conceptual multidimensional model of the DW 21 from user requirements and then we verify and enforce its correctness against data 22 sources by using a set of QVT relations based on multidimensional normal forms. 23 Finally, we provide some snapshots of the CASE tool we have used to implement 24 our QVT relations. 25
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تاریخ انتشار 2007