Database Systems (TODS)


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ACM Transactions on Database Systems (TODS), Volume 28 Issue 3, September 2003

Removing permissions in the flexible authorization framework
Duminda Wijesekera, Sushil Jajodia, Francesco Parisi-Presicce, Åsa Hagström
Pages: 209-229
DOI: 10.1145/937598.937599
The Flexible Authorization Framework (FAF) defined by Jajodia et al. [2001] provides a policy-neutral framework for specifying access control policies that is expressive enough to specify many known access control policies. Although the original...

Iterative spatial join
Edwin H. Jacox, Hanan Samet
Pages: 230-256
DOI: 10.1145/937598.937600
The key issue in performing spatial joins is finding the pairs of intersecting rectangles. For unindexed data sets, this is usually resolved by partitioning the data and then performing a plane sweep on the individual partitions. The resulting join...

Are quorums an alternative for data replication?
Ricardo Jiménez-Peris, M. Patiño-Martínez, Gustavo Alonso, Bettina Kemme
Pages: 257-294
DOI: 10.1145/937598.937601
Data replication is playing an increasingly important role in the design of parallel information systems. In particular, the widespread use of cluster architectures often requires to replicate data for performance and availability reasons. However,...