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

2. 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

3. 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.)

4. 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

5. 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

6. 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