Abstract
Existing systems that support semistructured views do not maintain semantics during the process of designing views. Thus, there is no guarantee that the views obtained are valid and reversible views. In this paper, we propose an approach to designing valid and reversible semistructured views. We employ four types of view operators, namely, select, drop, join and swap operators, and develop a set of rules to maintain the semantics of the views when the swap operator is applied. We also examine the reversible view problem and develop rules to guarantee the designed views are reversible. Finally, we examine the possible changes to the participation constraints of relationship types and propose rules to keep the participation constraints correct.
Keywords
- Functional Dependency
- Object Class
- Relationship Type
- Attribute Grade
- Incoming Edge
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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© 2005 Springer-Verlag Berlin Heidelberg
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Chen, Y.B., Ling, T.W., Lee, M.L. (2005). Maintaining Semantics in the Design of Valid and Reversible SemiStructured Views. In: Zhou, L., Ooi, B.C., Meng, X. (eds) Database Systems for Advanced Applications. DASFAA 2005. Lecture Notes in Computer Science, vol 3453. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11408079_70
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DOI: https://doi.org/10.1007/11408079_70
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-25334-1
Online ISBN: 978-3-540-32005-0
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