OWL: A Description Logic Based Ontology Language -- Preference Reasoning -- The G12 Project: Mapping Solver Independent Models to Efficient Solutions -- Use of Logic Programming for Complex Business Rules -- A Generator of Efficient Abstract Machine Implementations and Its Application to Emulator Minimization -- On the Relation Between Answer Set and SAT Procedures (or, Between cmodels and smodels) -- Towards an Integration of Answer Set and Constraint Solving -- A Comparison of CLP(FD) and ASP Solutions to NP-Complete Problems -- Guard and Continuation Optimization for Occurrence Representations of CHR -- Coordination of Many Agents -- Parallelizing Union-Find in Constraint Handling Rules Using Confluence Analysis -- An Optimised Semantic Web Query Language Implementation in Prolog -- A Distributed and Probabilistic Concurrent Constraint Programming Language -- HYPROLOG: A New Logic Programming Language with Assumptions and Abduction -- Abduction of Linear Arithmetic Constraints -- Towards Implementations for Advanced Equivalence Checking in Answer-Set Programming -- Hybrid Probabilistic Logic Programs with Non-monotonic Negation -- Reducing Inductive Definitions to Propositional Satisfiability -- Symbolic Support Graph: A Space Efficient Data Structure for Incremental Tabled Evaluation -- Dynamic Mixed-Strategy Evaluation of Tabled Logic Programs -- Nondeterminism Analysis of Functional Logic Programs -- Techniques for Scaling Up Analyses Based on Pre-interpretations -- Deductive Multi-valued Model Checking -- Polynomial Interpretations as a Basis for Termination Analysis of Logic Programs -- Testing for Termination with Monotonicity Constraints -- A Well-Founded Semantics with Disjunction -- Semantics of Framed Temporal Logic Programs -- Practical Higher-Order Pattern Unification with On-the-Fly Raising -- Small Proof Witnesses for LF -- A Type System for CHR -- Decision Support for Personalization on Mobile Devices -- A Generic Framework for the Analysis and Specialization of Logic Programs -- The Need for Ancestor Resolution When Answering Queries in Horn Clause Logic -- Modeling Systems in CLP -- A Sufficient Condition for Strong Equivalence Under the Well-Founded Semantics -- IMPACT: Innovative Models for Prolog with Advanced Control and Tabling -- Using CLP to Characterise Linguistic Lattice Boundaries in a Text Mining Process -- Hybridization of Genetic Algorithms and Constraint Propagation for the BACP -- The MYDDAS Project: Using a Deductive Database for Traffic Characterization -- Open World Reasoning in Datalog -- Optimizing Queries for Heterogeneous Information Sources -- Denotational Semantics Using Horn Concurrent Transaction Logic -- Gentra4cp: A Generic Trace Format for Constraint Programming -- Analyses, Optimizations and Extensions of Constraint Handling Rules: Ph.D. Summary -- Formalization and Verification of Interaction Protocols -- -LTL for Constraint-Based Security Protocol Analysis -- Concurrent Methodologies for Global Optimization -- A Temporal Programming Language for Heterogeneous Information Systems -- Nonmonotonic Logic Programs for the Semantic Web -- ICLP 2005 Doctoral Consortium -- Analysis and Optimization of CHR Programs.