Using ontologies to manage resources in grid computing: Practical aspects

Abstract. We are developing an agent-based intelligent middleware for the Grid (the Agents in Grid system). Resource providing agents are or-ganized in teams and negotiate contracts with agents representing users. All information is ontologically demarcated and semantically processed. In particular, user preferences are turned into ontology class expressions and used directly in contract negotiations. The aim of this chapter is to discuss in details how ontologies are used in the AiG system. First, we briefly discuss the most important issues encountered in development of the AiG ontology. We follow, with the description of the implementation of ontology-focused parts of the system.