Thisproceedingsvolumeofthe5thAOISWorkshopisanopportunityforlooking back at ?ve years of organizing AOIS workshops. What did we achieve with the AOIS workshop series? Where were we ?ve years ago, where are we now? Did ourthemeimpactontheinformationsystems?eldinthewaythatwehadhoped for? AOIS workshops have taken place in Seattle, Heidelberg, Stockholm, Austin, Montr´ eal, Interlaken, Toronto, Bologna, Melbourne, and Chicago, always in c- junction with a major conference on either multiagent systems in arti?cial - telligence (AI/MAS) or information systems (IS). We have tried to innovate in holding these workshops as biconference events (each year AOIS held two wo- shop events, one at an AI/MAS conference and one at an IS conference), as well as using the AOIS web site as a medium for communication among researchers. So, certainly, we have reached a wide audience of researchers around the world from both the AI/MAS and IS communities. But did we also manage to build up a dedicated AOIS community? Five years ago, we wrote: Agent concepts could fundamentally alter the nature of information systems of the future, and how we build them, much like structured analysis, ER modeling, and Object-Orientation has precipitated fundamental changes in IS practice. Of course, a period of ?ve years is too short for evaluating the success or failure of a new scienti?c paradigm. But still we may observe that while most IS conferences meanwhile list agents as one of their many preferred topics, agent-orientation is generally not considered to be a fundamental IS paradigm.

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Inhalt
Information Systems and Applications.- Design of a MAS into a Human Organization: Application to an Information Multi-agent System.- I-MINDS: An Agent-Oriented Information System for Applications in Education.- Trustworthy Service Caching: Cooperative Search in P2P Information Systems.- Agent-Based Support for Mobile Users Using AgentSpeak(L).- Market-Based Recommendations: Design, Simulation and Evaluation.- Methodologies.- Comparing Agent-Oriented Methodologies.- A Framework for Evaluating Agent-Oriented Methodologies.- Towards Reuse in Agent Oriented Information Systems: The Importance of Being Purposive.- Towards a More Expressive and Refinable Multiagent System Engineering Methodology.- Modelling, Analysis and Simulation.- A Pattern Language for Motivating the Use of Agents.- A Practical Agent-Based Approach to Requirements Engineering for Socio-technical Systems.- AOR Modelling and Simulation: Towards a General Architecture for Agent-Based Discrete Event Simulation.- Modelling Institutional, Communicative and Physical Domains in Agent Oriented Information Systems.