Service trading and mediation in distributed computing systems

摘要

The increased availability of global communication infrastructuresnallows providers and users of various application services to cooperatenin nearly unlimited geographic scopes. Problems of heterogeneity andnscale have motivated specific standardisation activities fornclient/server “trading” or service “mediation”ncomponents. Motivated by current limitations of the emerging ODP (OpennDistributed Processing) trader, this paper argues for a broader conceptnof general service “mediation” as more appropriate fornrealistic open distributed environments. The proposed mediation conceptnaddresses some of the heterogeneity and flexibility requirements of opennservice co-operation by a uniform “Service Interface DescriptionnLanguage” (SIDL). The goal is to support distributed applicationndevelopment for a “Common Open Service Market” (COSM) bynfacilitating flexible service selection and client/server interaction.nThe paper also presents basic components of a generalised trading andnmediation architecture as well as the status of a prototypenimplementation