by Keller, Ludwig

Trading based systems are tailored to handle acomplex number of system resources in distributed,permanently changing environments. These resources areusually represented by their service descriptions offered to a trader. In contrast to theconventional approach in which a service is provided byonly one service object, we propose an extended tradingconcept to maintain and to manage services in open distributed systems. It allows to mediatevalue-added services. These are either reliable servicesguaranteeing independence and autonomy of the serviceobjects or complex services that are defined by the functional composition of existing services.They are done by the cooperation of different serviceobjects. In this paper we present this extended tradingapproach and describe our system AGORA that implements the extended service model and the mediation ofvalue-added service in an open distributedsystem.

DOI: 10.1023/A:1018741110811
Print publication date: 12/1/1998
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