Permissions and obligations in hierarchical normative systems
ICAIL '03 Proceedings of the 9th international conference on Artificial intelligence and law
Normative autonomy and normative co-ordination: declarative power, representation, and mandate
Artificial Intelligence and Law
Temporalised normative positions in defeasible logic
ICAIL '05 Proceedings of the 10th international conference on Artificial intelligence and law
Rule-based agents in temporalised defeasible logic
PRICAI'06 Proceedings of the 9th Pacific Rim international conference on Artificial intelligence
Norms, institutional power and roles: towards a logical framework
ISMIS'06 Proceedings of the 16th international conference on Foundations of Intelligent Systems
The design of intelligent socio-technical systems
Artificial Intelligence Review
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A power describes the ability of an agent to act in some way. While this notion of power is critical in the context of organisational dynamics, and has been studied by others in this light, it must be constrained so as to be useful in any practical application. In particular, we are concerned with how power may be used by agents to govern the imposition and management of norms, and how agents may dynamically assign norms to other agents within a multi-agent system. We approach the problem by defining a syntax and semantics for powers governing the creation, deletion, or modification of norms within a system, which we refer to as normative powers. We then extend this basic model to accommodate more general powers that can modify other powers within the system, and describe how agents playing certain roles are able to apply powers, changing the system's norms, and also the powers themselves. We examine how the powers found within a system may change as the status of norms change, and show how standard norm modification operations --- such as the derogation, annulment and modification of norms --- may be represented within our system.