Database Systems (TODS)


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ACM Transactions on Database Systems (TODS), Volume 23 Issue 3, Sept. 1998

An access control model supporting periodicity constraints and temporal reasoning
Elisa Bertino, Claudio Bettini, Elena Ferrari, Pierangela Samarati
Pages: 231-285
DOI: 10.1145/293910.293151
Access control models, such as the ones supported by commercial DBMSs, are not yet able to fully meet many application needs. An important requirement derives from the temporal dimension that permissions have in many real-world situations....

Conceptual schema analysis: techniques and applications
S. Castano, V. De Antonellis, M. G. Fugini, B. Pernici
Pages: 286-333
DOI: 10.1145/293910.293150
The problem of analyzing and classifying conceptual schemas is becomig increasingly important due to the availability of a large number of schemas related to existing applications. The purposes of schema analysis and classification activities...

An efficient method for checking object-oriented database schema correctness
A. Formica, H. D. Groger, M. Missikoff
Pages: 333-368
DOI: 10.1145/293910.293152
Inheritance is introducted in object-oriented systems to enhance code reuse and create more compact and readable software. Powerful object models adopt multiple inheritance, allowing a type (or class) definition to inherit from more than one...