fulltext (3) - Models of Interaction as a Grounding for...

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Models of Interaction as a Grounding for Peer to Peer Knowledge Sharing David Robertson 1 ,AdamBarker 1 ,PaoloBesana 1 , Alan Bundy 1 , Yun Heh Chen-Burger 1 , David Dupplaw 2 , Fausto Giunchiglia 3 ,FrankvanHarmelen 4 , Fadzil Hassan 1 , Spyros Kotoulas 4 ,DavidLambert 1 ,GuoLi 1 , Jarred McGinnis 1 , Fiona McNeill 1 , Nardine Osman 1 , Adrian Perreau de Pinninck 5 , Ronny Siebes 4 , Carles Sierra 5 , and Chris Walton 1 1 Informatics, University of Edinburgh, UK 2 Electronics and Computer Science, University of Southampton, UK 3 Information and Communication Technology, University of Trento, Italy 4 Mathematics and Computer Science, Free University, Amsterdam, Netherlands 5 Arti±cial Intelligence Research Institute, Barcelona, Spain Abstract. Most current attempts to achieve reliable knowledge sharing on a large scale have relied on pre-engineering of content and supply services. This, like traditional knowledge engineering, does not by itself scale to large, open, peer to peer systems because the cost of being precise about the absolute semantics of services and their knowledge rises rapidly as more services participate. We describe how to break out of this deadlock by focusing on semantics related to interaction and using this to avoid dependency on apr ior i semantic agreement; instead making semantic commitments incrementally at run time. Our method is based on interaction models that are mobile in the sense that they may be transferred to other components, this being a mechanism for service composition and for coalition formation. By shifting the emphasis to interaction (the details of which may be hidden from users) we can obtain knowledge sharing of suf±cient quality for sustainable communities of practice without the barrier of complex meta-data provision prior to community formation. 1 Introduction At the core of this paper is an unusual view of the semantics of Web service coordi- nation. When discussing semantics it is necessary to ground our de±nitions in some domain in order to decide whether our formal machinery performs appropriate infer- ence. Normally this grounding is assumed to be in the Web services themselves, so formal speci±cation focuses on individual services. It seems natural then to assume that having de±ned the semantics of services precisely we can combine them freely as long as our means of combination preserves the local semantics of those services. This as- sumption is ill founded for large scale systems because, when we combine services, we normally share information (by connecting inputs to outputs) and this raises the issue of whether the semantics of information provided by a service is preserved by another service obtaining that information. Universal standardisation of semantics across ser- vices appears impractical on a large scale; partly because broad ontological consensus T.S. Dillon et al. (Eds.): Advances in Web Semantics I, LNCS 4891, pp. 81–129, 2008.
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This note was uploaded on 01/27/2011 for the course PHI 365 taught by Professor Spector during the Spring '10 term at SUNY Stony Brook.

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fulltext (3) - Models of Interaction as a Grounding for...

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