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Protocol Mediation for Adaptation in Semantic Web Services

Williams, Stuart K.; Battle, Steven A.; Esplugas Cuadrado, Javier


Keyword(s): semantic web; web services; interface description; protocols; mediation; distributed systems

Abstract: Protocol mediation enables interaction between communicating parties where there is a shared conceptual model of the intent and purpose of the communication, and where the mechanics of communication interaction vary. The communicating partners are using different protocols to achieve the same or similar ends. We present a description driven approach to protocol mediation which provides a more malleable approach to the integration of web services than the current rigid 'plug-and-socket' approach offered by description technologies such as WSDL. It enables the substitution of one service provider with another even though they use different interaction protocols. Our approach is centred on the identification of common domain specific protocol independent communicative acts; the description of abstract protocols which constrains the sequencing of communicative acts; and the description of concrete protocols that describe the mechanisms by which the client of a web service interface can utter and perceive communicative acts. This work was conducted as part of the EU funded Semantic Web enable Web Services project (SWWS EU IST-2002-37134). Notes: Javier Esplugas Cuadrado, Hewlett-Packard Espanola SL, Jose Echegaray no 8, La Rozas, Spain. 28230

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