WEBTRANSACT: A FRAMEWORK FOR SPECIFYING AND COORDINATING RELIABLE WEB SERVICES COMPOSITIONS
Abstract:
The recent evolution of internet technologies, mainly guided by the Extensible Markup Language (XML) and its related technologies, are extending the role of the World Wide Web from information interaction to service interaction. This next wave of the internet era is being driven by a concept named Web services. The Web services technology provides the underpinning to a new business opportunity, i.e., the possibility of providing value-added services through the composition of basic Web services. However, at its present stage, the Web services technology does not provide the necessary tools to build Web service compositions. The current Web services technology provides the necessary communication model for enabling message exchanges in the Web services environment. However, communication interoperability is only part of the problem when considering the building of reliable, maintainable, and scalable Web services compositions. Besides communication interoperability, the task of building Web service compositions requires mechanisms to deal with the inherent autonomy, and heterogeneity of Web services. Unlike components of traditional business process, Web services are typically provided by different organizations and they were designed not to be dependent of any collective computing entity. Since each organization has its own business rules, Web services must be treated as strictly autonomous units. Heterogeneity manifests
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