Titlebook: Dataspace: The Final Frontier; 26th British Nationa Alan P. Sexton Conference proceedings 2009 Springer-Verlag Berlin Heidelberg 2009 BitTo

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Dimensions of Dataspacesbined with opportunities for incremental refinement, enabling a “pay as you go” approach. However, results that seek to realise the vision exhibit considerable variety in their contexts, priorities and techniques, to the extent that the definitional characteristics of dataspaces are not necessarily

objection

The Use of the Binary-Relational Model in Industry: A Practical Approachrecord storage and manipulation structure. The authors have already reported experimental considerations of the behaviour of n-ary Relational, Binary-Relational, Associative and Transrelational models within the context of Data Warehousing [1], [2], [3] to address issues of storage efficiency and co

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Multi-Join Continuous Query Optimization: Covering the Spectrum of Linear, Acyclic, and Cyclic Querinuous query optimizers commonly adopt heuristic techniques such as Adaptive Greedy to attain polynomial-time execution. However, these techniques are known to produce optimal plans only for linear and star shaped join queries. Motivated by the prevalence of acyclic, cyclic and even complete query sh

Fsh238

An XML-Based Model for Supporting Context-Aware Query and Cache Management Two of the fundamental aspects of such management are update notifications and context-aware query processing. Unfortunately, DBSs does not provide a built-in update notification function and are not aware of the context of their usage. This paper presents an XML model called .(XML-based Relational

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Answering Multiple-Item Queries in Data Broadcast Systems The few that did, have proposed approaches that are less responsive to changes in the query queue. It is not immediately clear how single-item scheduling algorithms will perform when used in answering pull-based multiple-item queries. This paper investigates the performance of existing single-item

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A Study of a Positive Fragment of Path Queries: Expressiveness, Normal Form, and Minimizationdied from two angles. First, we establish that Path. is equivalent in expressive power to a particular sub-fragment as well as to the class of tree queries, a sub-class of the first-order conjunctive queries defined over label, parent-child, and child-parent predicates. The translation algorithm fro

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Metamodel-Based Optimisation of XPath Queriest trees cumbersome for query processors. Many research teams have addressed this issue with efficient algorithms and powerful indexes, but XML systems still cannot perform at the same level as relational databases. In this paper, we present a metamodel, which enables us to efficiently solve relation

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Compacting XML Structures Using a Dynamic Labeling Schemements has emerged. A common approach to achieve this is to use labeling techniques. However, their main problem is that they either do not support updating XML data dynamically or impose huge storage requirements. On the other hand, with the verbosity and redundancy problem of XML, which can lead to

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