A Middleware Architecture for Building Contract-Aware Agent-Based Services -- A Knowledge Technologies-Based Multi-agent System for eGovernment Environments -- Towards a Broker Agent in the Semantic Services Environment -- Pattern-Based Semantic Tagging for Ontology Population -- Service-Based Integration of Grid and Multi-Agent Systems Models -- Discovering Homogenous Service Communities through Web Service Clustering -- Collaborative Learning Agents Supporting Service Network Management -- A Multi-Agent Architecture for NATO Network Enabled Capabilities: Enabling Semantic Interoperability in Dynamic Environments (NC3A RD-2376) -- An Agent for Asymmetric Process Mediation in Open Environments -- Towards an Emergent Taxonomy Approach for Adaptive Profiling -- Commitment-Based Service Coordination.