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View integration aims at replacing a set of existing views by a single new one in such a way that with respect to information capacity the new view dominates or is equivalent to the old ones. Therefore, in this article we first investigate a theory of schema equivalence and dominance for the higher-order Entity-Relationship model (HERM) based on the notion of computable queries. We then develop formal...
Normalization is a basic principle when designing the relational database, which guarantees the revision of data structure and the quality of reorganization, but when referring to data mining system, anti-normalization is needed for data warehouse design. This paper discusses the necessity of anti-normalization and the typical design methods. At the same time, it explains how to realize the data warehouse...
Standardization is a basic principle to design the relational database, which guarantees the revision of data structure and the quality of reorganization, but when referring to data mining system, anti-standardization is needed for data warehouse design. This paper discusses the necessity of anti-standardization and the specific design methods. With the development of data mining application, the...
View Integration is known to be a decisive part of data warehouse design. It has also been shown that the use of formal methods such as abstract state machines (ASMs) can contribute to high-quality designs, in particular, if standard refinements can be exploited. In this paper we continue a direction of research that exploits a typed version of ASMs for this purpose in order to be able to preserve...
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