NDLI: Modeling and Analysis of Semantic Web Services with Petri Nets

Content Provider	IEEE Xplore Digital Library
Author	Yaojun Han Changjun Jiang Xuemei Luo
Copyright Year	2007
Description	Author affiliation: Shanghai Int. Studies Univ., Shanghai (Yaojun Han)
Abstract	The semantic Web is an extension of the current Web in which information is given well-defined meaning, aiming for machine-understandable Web resources. OWL-S is an ontology language for describing web services in terms of their inputs, outputs, preconditions, effects and their process model. There is a need for formal modeling and analyzing techniques and tools for reliable web services and their composition because of dynamic and complex service composition process. Petri nets are well suited for capturing flows in web services, for modeling the distributed nature of web services, for representing methods in a web service and for reasoning about the correctness of the flows. We use an extended weighted timed Petri net to model and analyze the semantic Web service described by OWL-S. In order to reduce the complexity of model, we use hierarchical Petri nets to model four basic structures of the Web service composition. We propose a definition of reachable service graph and give an algorithm for constructing the reachable service graph of extended weighted timed Petri net. Finally, we discuss the correctness and time and cost performance of the Web service composition by analyzing the reachable service graph.
Starting Page	122
Ending Page	127
File Size	305753
Page Count	6
File Format	PDF
ISBN	0769530079
DOI	10.1109/SKG.2007.82
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-29
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Semantic Web Web services Petri nets Humans Ontologies Educational institutions Performance analysis Intelligent agent Machine intelligence Information analysis
Content Type	Text
Resource Type	Article

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