Download Advances in Database Technology - EDBT 2004: 9th by Richard Hull (auth.), Elisa Bertino, Stavros PDF

By Richard Hull (auth.), Elisa Bertino, Stavros Christodoulakis, Dimitris Plexousakis, Vassilis Christophides, Manolis Koubarakis, Klemens Böhm, Elena Ferrari (eds.)

The ninth foreign convention on Extending Database know-how, EDBT 2004, was once held in Heraklion, Crete, Greece, in the course of March 14–18, 2004. The EDBT sequence of meetings is a longtime and prestigious discussion board for the trade of the newest study ends up in info administration. Held each years in an enticing eu position, the convention presents distinct opp- tunities for database researchers, practitioners, builders, and clients to discover new rules, thoughts, and instruments, and to interchange reviews. the former occasions have been held in Venice, Vienna, Cambridge, Avignon, Valencia, Konstanz, and Prague. EDBT 2004 had the subject matter “new demanding situations for database technology,” with the aim of encouraging researchers to take a better curiosity within the present interesting technological and alertness developments and to plot and deal with new learn and improvement instructions for database expertise. From its early days, database know-how has been challenged and complicated by way of new makes use of and functions, and it keeps to conform besides program specifications and advances. Today’s DBMS expertise faces but a number of new demanding situations. Technological traits and new computation paradigms, and functions comparable to pervasive and ubiquitous computing, grid computing, bioinformatics, belief administration, digital groups, and electronic asset administration, to call quite a few, require database know-how to be deployed in numerous environments and for a couple of di?erent reasons. Such an in depth deployment also will require reliable, resilient database structures, in addition to easy-to-manage and ?exible ones, to which we will be able to entrust our facts in no matter what shape they are.

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Extra info for Advances in Database Technology - EDBT 2004: 9th International Conference on Extending Database Technology, Heraklion, Crete, Greece, March 14-18, 2004

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4 Security Security is an issue in any system, and particularly in a distributed system. It becomes even more important if the system is a common marketplace with great heterogeneity of purpose and intent. G. Jeffery a) prevention of unauthorised access: this requires authentication of the user, authorisation of the user to access or use a source or resource and provision or denial of that access. The current heterogeneity of authentication and authorisation mechanisms provides many opportunities for deliberate or unwitting security exposure; b) ensuring availability of the source or resource: this requires techniques such as replication, mirroring and hot or warm failover.

The work reported in [5] is a good start. Berners Lee who coined the term semantic web (see [2]) has stressed that the key to developing a semantic web is efficiently managing RDF documents. That is, RDF is fundamental to the semantic web. While XML is limited in providing machine understandable documents, RDF handles this limitation. As a result, RDF provides better support for interoperability as well as searching and cataloging. It also describes contents of documents as well as relationships between various entities in the document.

The advent of the World Wide Web (WWW) in the mid 1990s has resulted in even greater demand for managing data, information, and knowledge effectively. There is now so much data on the web that managing them with conventional tools is becoming almost impossible. As a results, to provide interoperability as well as warehousing between multiple data sources and systems, and to extract information from the databases and warehouses on the web, various tools are being developed. As the demand for data and information management increases, there is also a critical need for maintaining the security of the databases, applications, and information systems.

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