Opportunism is a behavior that causes norm violation and promotes own value. In the context of multi-agent systems, we constrain such a selfish behavior through setting enforcement norms. Because opportunistic behavior cannot be observed indirectly, there has to be a monitoring mechanism that can detect the performance of opportunistic behavior in the system. This paper provides a logical frame...

This paper aims at giving a classification of argumentation games agents play within a multi-agent setting. We investigate different scenarios of such argumentation games that differ in the protocol used for argumentation, i. e. direct, synchronous, and dialectical argumentation protocols, the awareness that agents have on other agents beliefs, and different settings for the preferences of agen...

In multi-agent systems, agents interact by sending and receiving messages and the actual sequences of message form interaction structures between agents. Protocols and agents organized internally by agent roles support these interaction structures. Description and use of protocols based on agent roles are supported by a simple and expressive application framework.