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Discovering networked services in pervasive computing environments is problematic as multiple Service Discovery Protocols (SDPs), differing on their services description formats as well as advertisement and request models, have already become (de-facto) standards. This calls for a solution to SDP interoperability, enabling clients to locate networked services independent of the SDP they use to advertise their presence. In this paper, the authors report on their experience in developing two such solutions: the transparent approach of INDISS based on message translation, and the explicit approach of MSDA based on protocol integration.
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