Advanced Information Systems Engineering: 12th International by Dennis Tsichritzis (auth.), Benkt Wangler, Lars Bergman

By Dennis Tsichritzis (auth.), Benkt Wangler, Lars Bergman (eds.)

CAiSE 2000 was once the twelfth within the sequence of foreign meetings on complex info structures Engineering. within the 12 months 2000 the convention again to Stockholm the place it used to be equipped the first actual time. for the reason that that yr, 1989, the CAiSE meetings have constructed into a tremendous discussion board for the presentation and trade of analysis effects and useful reviews in the box of data platforms Engineering. the target of the CAiSE convention sequence is to compile researchers and practitioners within the box of data structures engineering to satisfy every year so one can speak about evolving examine matters and purposes during this box. The CAiSE convention sequence additionally goals to supply a chance for younger scientists to set up relationships with senior scientists of their components of curiosity. Stockholm is a vital heart of analysis and improvement for a few of the top IT and communications businesses in Europe and certainly, on the planet. In music with this surroundings, a massive subject matter of CAiSE 2000 was once "information platforms and prone in a digitized world". This subject displays the massive advancements in verbal exchange know-how, together with the expanding use of net and WWW, that has taken position over the past years, and that has ended in larger communique and more uncomplicated info entry regularly. furthermore, this improvement has initiated alterations within the approach corporations cooperate and trade.

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Additional resources for Advanced Information Systems Engineering: 12th International Conference, CAiSE 2000 Stockholm, Sweden, June 5–9, 2000 Proceedings

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If the condition holds, then the successor of the multiservice is activated and services in execution are canceled. length>0, where Rejections is a variable of type ListOf (String), and length is an attribute common to every list variable that contains the number of elements in the list. Fig. 3 shows a sample specification of a multiservice node in eFlow. The specification includes the reference to the service node to be 20 F. Casati et al. instantiated (multiple times) as part of the multiservice node, as well as the activation and termination conditions.

To meet such demands, the technology we use to build information agents needs to support customizability and evolution. The XIB (extensible Information Broker) is a framework intended to facilitate the construction of information brokers that meet such extensibility and flexibility requirements. The basic idea is to make the web services currently only available to users also accessible from within other applications. To enable this, we define a service description language, called XIBL, intended to be used as the common language for various services.

18 F. Casati et al. These include dynamic service discovery, multiservice nodes, and generic nodes. In the following we present an overview of these features. 1 Dynamic Service Discovery A service node represents the invocation of a basic or composite service. Besides defining the data that the node is allowed to read and modify, and possibly a deadline to manage delays in service execution, a service node specification includes the description of the service to be invoked. com provider. While useful in some situations, such a static service binding is often too rigid, since it does not allow to: − − − select the appropriate service depending on the customer's requirements: for instance, some customers may prefer a low-cost e-mail campaign, while other may prefer advertisements via TV, radio stations, or web sites; decouple service selection from the process definition: different service processes may require an advertisement service, and the selection criteria may need to be defined at the company level rather than at the composite service level; dynamically discover the best currently available service that fits the need of a specific customer.

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