Logic Programming and Nonmonotonic Reasoning 6th International Conference, LPNMR 2001, Vienna, Austria, September 17-19, 2001. Proceedings

This book constitutes the refereed proceedings of the 6th International Conference on Logic Programming and Nonmonotonic Reasoning, LPNMR 2001, held in Vienna, Austria in September 2001. The 22 revised full papers and eleven system descriptions presented with five invited papers were carefully reviewed and rigorously selected. Among the topics addressed are computational logic, declarative information extraction, model checking, inductive logic programming, default theories, stable logic programming, program semantics, incomplete information processing, concept learning, declarative specification, Prolog programming, many-valued logics, etc.

Invited Papers.- A Computational Logic Approach to Heterogenous Agent Systems.- Declarative Information Extraction, Web Crawling, and Recursive Wrapping with Lixto.- On The Complexity of Model Checking and Inference in Minimal Models.- Data Integration Needs Reasoning.- Nonmonotomic Inductive Logic Programming.- Regular Papers.- Strong Equivalence for Logic Programs and Default Theories (Made Easy).- On the Effect of Default Negation on the Expressiveness of Disjunctive Rules.- On the Expressibility of Stable Logic Programming.- On the Relationship between Defeasible Logic and Well-Founded Semantics.- A Comparative Study of Well-Founded Semantics for Disjunctive Logic Programs.- Reasoning with Open Logic Programs.- Representation of Incomplete Knowledge by Induction of Default Theories.- Explicity Using Default Knowledge in Concept Learning: An Extended Description Logics Plus Strict and Default Rules.- Declarative Specification and Solution of Combinatorial Auctions Using Logic Programming.- Bounded LTL Model Checking with Stable Models.- Diagnosing Physical Systems in A-Prolog.- Planning with Different Forms of Domain-Dependent Control Knowledge — An Answer Set Programming Approach.- Encoding Solutions of the Frame Problem in Dynamic Logic.- ?-RES: Reasoning about Actions, Events and Observations.- Omega-Restricted Logic Programs.- Improving ASP Instantiators by Join-Ordering Methods.- Optimizing the Computation of Heuristics for Answer Set Programming Systems.- New Generation Systems for Non-monotonic Reasoning.- Algorithms for Computing X-Minimal Models.- Fixpoint Characterizations for Many-Valued Disjunctive Logic Programs with Probabilistic Semantics.- Multi-adjoint Logic Programming with Continous Semantics.- Multi-dimensional Dynamic KnowledgeRepresentation.- Antitonic Logic Programs.- System Description.- A-system: Declarative Programming with Abduction.- An Update Front-End for Extended Logic Programs.- aspps — An Implementation of Answer-Set Programming with Propositional Schemata.- NoMoRe: A System for Non-Monotonic Reasoning under Answer Set Semantics.- plp: A Generic Compiler for Ordered Logic Programs.- Prototypes for Reasoning with Infinite Stable Models and Function Symbols.- psmodels: Stable Models Based on Pertinence.- System Description: DLV.- System Description: The DLVK Planning System.- The Smodels System.- The USA-Advisor: A Case Study in Answer Set Planning.