??? Lack. of. a. standard: Though several conceptual models have been proposed,
none of them has been accepted as a standard so far, and all vendors
propose their own proprietary design methods. We see two main reasons for
this: (1) though the conceptual models devised are semantically rich, some of
the modeled properties cannot be expressed in the target logical models, so
the translation from conceptual to logical is incomplete; and (2) commercial
CASE tools currently enable designers to directly draw logical schemata, thus
no industrial push is given to any of the models. On the other hand, a unified
conceptual model for DWs, implemented by sophisticated CASE tools, would
be a valuable support for both the research and industrial communities.
R zz
Copyright ?© 2007, Idea Group Inc. Copying or distributing in print or electronic forms without written permission of
Idea Group Inc. is prohibited.
??? Design.patterns:.In software engineering, design patterns are a precious support
for designers since they propose standard solutions to address common
modeling problems. Recently, some preliminary attempts have been made to
identify relevant patterns for multidimensional design, aimed at assisting DW
designers during their modeling tasks by providing an approach for recognizing
dimensions in a systematic and usable way (Jones & Song, 2005).
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