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...s[4]sObject Management Group. Trading Object ServicesSpecification, version 1.0.s2000.s[5]sOASIS. ebXML Registry Services and Protocols Versions3.0. Fuger, S., Najmi, F., and Stojanovic, N.sMay 2005.s=-=[6]-=-sHuhns, M. N. and Singh, M. P., "Service-orientedscomputing: Key concepts and principles," IEEE InternetsComputing, vol. 9, no. 1, pp. 75-81, 2005.s[7]sChristensen, E., Curbera, F., Meredith, G., ands...

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...acceptable in dynamic environments where registries may fail.sIn [11], a peer-to-peer infrastructure based on a hypercube scheme is presented.sHypercubes are vulnerable to a high churn rate. Finally, =-=[12]-=- presents a super-peersbased solution that has no aliveness information and no LAN discovery. To conclude,scurrent Web Service discovery mechanisms do not support our requirements wellsenough. The opp...

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...sing semantics we can enhance service descriptions, reduce ambiguity and enablesdynamic service usage. There are several efforts in the areasof Semantic Web Services research, notably OWL-S [8],sWSMO =-=[9]-=-, and SAWSDL [10]. These efforts are mostlysconcerned with describing services, and leave the challenge of service advertisement distribution to existing WebsService standards, specifically UDDI. It i...

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...sements can becomesquite large, compared to for example URI strings.sOften, registry technologies have their own Registry Information Model, or RIM. Examples of this are thesebXML registry/repository =-=[11]-=- information model and thesUDDI information model. This RIM must be used if oneswants to exploit such a technology, and may pose restrictions on the aspects of a service possible to describe. Further,...

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...ks).s• Security must also be handled, but is outside thesscope of this paper.sThe remainder of this paper tries to take these requirements into account.sASPECTS OF A SERVICE DISCOVERYsARCHITECTUREsIn =-=[5]-=-, we discussed semantic service discovery in dynamic environments along the axes of service descriptionsexpressivity and service discovery infrastructure robustness. Let us take a look at what we thin...