Web Reasoning and Rule Systems: First International by Włodzimierz Drabent, Jan Małuszyński (auth.), Massimo

By Włodzimierz Drabent, Jan Małuszyński (auth.), Massimo Marchiori, Jeff Z. Pan, Christian de Sainte Marie (eds.)

This ebook constitutes the refereed lawsuits of the 1st foreign convention on internet Reasoning and Rule structures, RR 2007, held in Innsbruck, Austria in June 2007 as a merger of the 3 formerly separate occasions: foreign Workshop on ideas and perform of Semantic net Reasoning (PPSWR), the overseas convention on ideas and Rule Markup Languages for the Semantic net (RuleML), and the foreign Workshop on Reasoning on the net (RoW).

The 14 revised complete papers, 15 revised brief papers awarded including 7 poster papers have been conscientiously reviewed and chosen from over 60 submissions. The papers deal with all present issues in internet reasoning and rule platforms comparable to acquisition of ideas and ontologies via wisdom extraction, layout and research of reasoning languages, applied instruments and platforms, standardization, ontology usability, ontology languages and their relationships, ideas and ontologies, reasoning with uncertainty, reasoning with constraints, rule languages and platforms, semantic internet providers modeling and applications.

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Extra info for Web Reasoning and Rule Systems: First International Conference, RR 2007, Innsbruck , Austria, June 7-8, 2007. Proceedings

Example text

The assignment of tokens to the places of a Petri net is called the marking: Definition 2. A marking is function m : P → N that assigns to each place the number of tokens in this place. The marking represents the state of the Petri net. State changes of the Petri net result in different markings. State changes can occur when an enabled transition fires: Definition 3. A transition t is enabled if all its input places ·t contain at least one token. If a transition t fires one token is removed from each input place and one token is added to each output place.

Com ” , t r a n s p o r t= ” h t t p : / / . . / HTTP/ ” ) { var B } ON v a r B −> b i g b u y {{ }} END Fig. 3. Deductive rule (left) and reactive rule (right) query in the rule body. 5 when we look at aggregation of data. 2 for a deeper discussion. Reactive rules are used for specifying a reaction to the occurrence of an event. The usual (re)action is constructing a new event message (as with deductive rules) and use it to call some Web Service. Note that this new event leaves the system and that it is up to the receiver to decide on the occurrence time (typically such events are considered to happen only at the time point when the corresponding message is received).

A workflow net is sound if it terminates with one token in place o and no tokens in any other place and it does not contain any dead tasks. In the following we will limit ourselves to sound workflow nets to model service compositions. 3 Formal Model To support the calculation of service composition functionality, workflow nets need to be extended to incorporate service semantics. Before this can be done, we first need to define a few basic concepts. A service is a discrete business functionality. It is described by a service specification: Definition 5.

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