Abstracts of Invited Papers -- Roles, Counts-as and Deontic and Action Logics -- Norms and Electronic Institutions -- Emotion Models for Situated Normative Systems? -- Contributed Papers -- Addressing Moral Problems Through Practical Reasoning -- A Logical Architecture of a Normative System -- Delegation of Power in Normative Multiagent Systems -- Strategic Deontic Temporal Logic as a Reduction to ATL, with an Application to Chisholm’s Scenario -- Acting with an End in Sight -- A State/Event Temporal Deontic Logic -- Speech Acts with Institutional Effects in Agent Societies -- Counts-as: Classification or Constitution? An Answer Using Modal Logic -- Don’t Ever Do That! Long-Term Duties in PD e L -- On the Normative Aspect of Signalling Conventions -- Permissions and Uncontrollable Propositions in DSDL3: Non-monotonicity and Algorithms -- Conflicting Obligations in Multi-agent Deontic Logic -- Intermediate Concepts in Normative Systems -- Propositional Quantifiers in Deontic Logic -- A Question of Trust: Assessing the Fulfillment of Commitments in Terms of Strategies -- The Deontic Component of Action Language -- A Complete and Decidable Axiomatisation for Deontic Interpreted Systems -- Sequences, Obligations, and the Contrary-to-Duty Paradox.

This volume presents the papers contributed to DEON 2006, the 8th Inter- tional Workshop on Deontic Logic in Computer Science, held in Utrecht, The Netherlands, July 12–14, 2006. These biennial DEON (more properly, ?EON) workshops are designed to promote international cooperation among scholars across disciplines who are interested in deontic logic and its use in computer science. They support research that links the formal-logical study of normative concepts and normative systems with computer science, arti?cial intelligence, philosophy, organization theory, and law. Papers for these workshops might address such general themes as the dev- opment of formal systems of deontic logic and related areas of logic, such as logics of action and agency, or the formal analysis of all sorts of normative concepts, such as the notions of rule, role, regulation, authority, power, rights, respon- bility, etc. , or the formal representation of legal knowledge. They might also be more concerned with applications, such as the formal speci?cation of systems for the management of bureaucratic processes in public or private administration, or the speci?cation of database integrity constraints or computer security protocols, and more. Of particular interest is the interaction between computer systems and their users. (The DEON 2006 website, http://www. cs. uu. nl/deon2006/,c- tains links to previous workshops and their papers. This history reveals a vibrant interdisciplinary research program.