Special Issue: Middleware for Grid Computing

This paper presented at the 4th International Workshop on Middleware for Grid Computing (MGC 2006), which was held in conjunction with the ACM/IFIP/USENIX 7th International Middleware Conference during November 2006 in Melbourne, Australia. The goal of the fourth edition of the MGC workshop was to bring together researches in the field of middleware, addressing large-scale and real-world problems in grid environments, including Grid and Web Services Architectures and Middleware, Object Metadata and Schemas in Grid Middleware, Programming Models and Tools in Grid Middleware, Resource Management and Scheduling, Strategies and Protocols for QoS in Grid Middleware, Information Services in Grid Middleware, Dependability and Fault Tolerance in Grid Middleware.