Multi-agent Systems.- A Logic Programming Language for Multi-agent Systems.- A Proof-System for the Safe Execution of Tasks in Multi-agent Systems.- An Argumentation Framework for Merging Conflicting Knowledge Bases.- Multi-agent Logics of Dynamic Belief and Knowledge.- Evolution and Changes.- Evolving Logic Programs.- A Compilation of Updates plus Preferences.- Description Logic and Semantic Web.- Towards Service Description Logics.- P- (D): A Probabilistic Extension of (D) for Probabilistic Ontologies in the Semantic Web.- A Temporal Description Logic for Reasoning over Conceptual Schemas and Queries.- Complexity Issues.- Polynomial-Length Planning Spans the Polynomial Hierarchy.- Complexity of Multi-agent Systems Behavior.- Complexity and Algorithms for the Matching of Bag and Set Terms.- Probabilistic Logic.- Non-commutativity and Expressive Deductive Logic Databases.- Using Institutions for the Study of Qualitative and Quantitative Conditional Logics.- Planning.- Theoretical and Empirical Aspects of a Planner in a Multi-agent Environment.- Answer Set Planning under Action Costs.- Modal Logic and Causal Reasoning.- On Fibring Semantics for BDI Logics.- A Modal Formulation of McCain and Turner’s Theory of Causal Reasoning.- Second-Order Quantifier Elimination in Modal Contexts.- Theory.- Interpolation Theorems for Nonmonotonic Reasoning Systems.- Minimal Answer Computation and SOL.- Decidability of Interval Temporal Logics over Split-Frames via Granularity.- Reasoning under Uncertainty.- Uncertainty and Partial Non-uniform Assumptions in Parametric Deductive Databases.- A Qualitative Reasoning with Nuanced Information.- Satisfiability.- Dependent and Independent Variables in Propositional Satisfiability.- A DPLL-Based Calculus for Ground SatisfiabilityModulo Theories.- Paraconsistent Reasoning.- Paraconsistent Reasoning via Quantified Boolean Formulas, I: Axiomatising Signed Systems.- Three-Valued Logics for Inconsistency Handling.- Paraconsistent Logic Programs.- Actions and Causation.- Interpolation Properties of Action Logic: Lazy-Formalization to the Frame Problem.- Reasoning about Actions in Prioritized Default Theory.- Towards a Conditional Logic of Actions and Causation.- Logics for Agents.- Axiomatising Nash-Consistent Coalition Logic.- Representing Possibilities in Relation to Constraints and Agents.- An Abductive Logic Programming Architecture for Negotiating Agents.- Semantics.- Preferred Answer Sets for Ordered Logic Programs.- Implementing Ordered Disjunction Using Answer Set Solvers for Normal Programs.- An Infinite-Valued Semantics for Logic Programs with Negation.- Optimization Issues in Answer Set Semantics.- More on noMoRe.- Answer Set Programming by Ant Colony Optimization.- Testing the Equivalence of Logic Programs under Stable Model Semantics.- System Session.- Argumentative Reasoning with ABEL.- COBA: A Consistency-Based Belief Revision System.- Constraint Lingo: A Program for Solving Logic Puzzles and Other Tabular Constraint Problems.- : Integrating Data Mining with Intelligent Query Answering.- NoMoRe: Non-monotonic Reasoning with Logic Programs.- Process Miner — A Tool for Mining Process Schemes from Event-Based Data.- SMILES: A Multi-purpose Learning System.- The aspps System.- The DLV System.- The DLVK Planning System: Progress Report.- Z-log: Applying System-Z.- Invited Talks.- Hypergraph Transversal Computation and Related Problems in Logic and AI.- Alternation.- The USA-Advisor: A Case Study in Answer Set Programming.