Titlebook: New Horizons in Information Management; 20th British Nationa Anne James,Muhammad Younas,Brian Lings Conference proceedings 2003 Springer-Ve

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External Sorting with On-the-Fly Compressiond sorting must use disk, and cost minimisation involves complex trade-offs. In this paper, we explore the effect of compression on the cost of external sorting. Reduction in the volume of data potentially allows costs to be reduced — through reductions in disk traffic and numbers of temporary files

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MaxDomino: Efficiently Mining Maximal Setsing scheme to collapse the database to a form that contains only unique transactions. Unlike traditional bottom up approach with look-aheads, MaxDomino employs a top down strategy with selective bottom up search for mining maximal sets. Using the connect dataset [Benchmark dataset created by Univers

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Evaluating Maintenance Policies for Externally Materialised Multi-source Viewso those sources. As changes are committed in the sources, the externally materialised view must be updated to reflect those changes. A maintenance policy determines when and how to conduct updates. As sources may not be cooperating maintenance of externally materialised views is different from tradi

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Database Schema Transformation Optimisation Techniques for the AutoMed Systeming languages. It is based on the idea of expressing transformations of schemas as a sequence of primitive transformation steps, each of which is a bi-directional mapping between schemas. To become an efficient schema integration system in practice, where the number and size of schemas involved in t

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Using Similarity-Based Operations for Resolving Data-Level Conflictsmantic overlapping sources as well as during combining complementary data from different sources. Though using SQL operations like grouping and join seems to be a viable way, they fail if the attribute values of the potential duplicates or related tuples are not equal but only similar by certain cri

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Multilevel Secure Rules and Its Impact on the Design of Active Database Systemshe database or in the environment. One potential use of this technology is in the area of multilevel secure (MLS) data processing, such as, military, where the subjects and objects are classified into different security levels and mandatory access control rules govern who has access to what. Unfortu