From Norm Adoption to Norm Internalization -- Norms, Action and Agency in Multi-agent Systems -- Towards a Logical Analysis of the Judgment on Facts -- Deontic Redundancy: A Fundamental Challenge for Deontic Logic -- A Dyadic Operator for the Gradation of Desirability -- Deontics = Betterness + Priority -- Axioms for Obligation and Robustness with Temporal Logic -- Moral Particularism and Deontic Logic -- Relevance, Derogation and Permission -- Retroactive Legal Changes and Revision Theory in Defeasible Logic -- Towards Metalogical Systematisation of Deontic Action Logics Based on Boolean Algebra -- Avoiding Deontic Explosion by Contextually Restricting Aggregation -- Obligations and Prohibitions in Talmudic Deontic Logic -- Introducing Exclusion Logic as a Deontic Logic -- Privacy Policies with Modal Logic: The Dynamic Turn -- Value-Based Argumentation for Justifying Compliance -- A Logical Model of Private International Law -- Where Did Mally Go Wrong? -- Relationships between Actions Performed by Institutional Agents, Human Agents or Software Agents -- Characterising Responsibility in Organisational Structures: The Problem of Many Hands -- A Logical Analysis of Commitment Dynamics -- Forbidding Undesirable Agreements: A Dependence-Based Approach to the Regulation of Multi-agent Systems.

This volume presents the refereed proceedings of the 10th International Conference on Deontic Logic in Computer Science, DEON 2010, held in Fiesole, Italy, in July 2010. The 18 revised papers included in the volume were carefully reviewed and selected from 34 submissions. Topics covered include connections preferences, deontic logic and contrary-to-duties, the use of input/output logic, the study of norm dynamics, models of agents and institutions, argumentation, compliance, and various alternative analyses of deontic notions.