Conceptual, Logical, and Physical Design of Data Warehouses DOLAP 2004 Sergio Luján-Mora

Current DW modeling Conceptual modeling recognized as an important phase for DW design Different approaches for conceptual modeling: Golfarelli, Rizzi Husemann et al. Sapia et al. Tryfona et al. Abello et al. Trujillo et al. … Own formalisms Extend standard formalisms None accepted as a standard

Current DW modeling Rich conceptual models Ability to represent as many important semantic features as possible . For example: complex classification hierarchies (e.g. Non-strict, non-covering, etc.)

Current DW modeling Logical models? Physical models? Implementation? Star schema Multidimensional models Physical models? Practically, no research Implementation? Not all the important features of rich conceptual models are directly supported by most of commercial tools

Ideal DW modeling Tackle the conceptual, logical, and physical design in an integrated framework Same modeling language Different levels of abstraction Overlapping diagrams and automatic mapping transformation between diagrams

Ideal DW modeling Automatically generate different information (as much as possible) Database schema Metadata Query navigation patterns Information accepted by DW platforms Is CWM the solution? Enough information? Metrics to provide quality feedback in the design process