Reconciling Semantic Heterogeneity in Web Services Composition
HEC Paris - Operations Management and Information Technology
Massachusetts Institute of Technology (MIT) - Sloan School of Management
Hongwei (Harry) Zhu
University of Massachusetts Lowell; Massachusetts Institute of Technology (MIT); Old Dominion University
September 24, 2009
MIT Sloan Research Paper No. 4755-09
Composite Information Systems Laboratory Working Paper No. 2009-08
Service Oriented Computing (SOC) is a popular computing paradigm for the development of distributed Web applications. Service composition, a key element of SOC, is severely hampered by various types of semantic heterogeneity among the services. In this paper, we address the various semantic differences from the context perspective and use a lightweight ontology to describe the concepts and their specializations. Atomic conversions between the contexts are implemented using XPath functions and external services. The correspondences between the syntactic service descriptions and the semantic concepts are established using a flexible, standard-compliant mechanism. Given the naive BPEL composition ignoring semantic differences, our reconciliation approach can automatically determine and reconcile the semantic differences. The mediated BPEL composition incorporates necessary conversions to convert the data exchanged between different services. Our solution has the desirable properties (e.g., adaptability, extensibility and scalability) and can significantly alleviate the reconciliation efforts for Web services composition.
Number of Pages in PDF File: 19
Keywords: Web service, service composition, semantic heterogeneity, ontology, context
Date posted: September 24, 2009
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