JackMinker(UniversityofMaryland,USA) AnilNerode(CornellUniversity,USA) IlkkaNiemela(HelsinkiUniversityofTechnology,Finland) DinoPedreschi(UniversityofPisa,Italy) PasqualeRullo(UniversityofCalabria,Rende,Italy) ChiakiSakama(WakayamaUniversity,Japan) V. S. Subrahmanian(UniversityofMaryland,USA) FrancescaToni(ImperialCollege,London,U. K. ) MiroslawTruszczynski(UniversityofKentuckyatLexington,USA) HudsonTurner(UniversityofMinnesotaatDuluth,USA) MosheY. Vardi(RiceUniversity,USA) Jia-HuaiYou(UniversityofAlberta,Canada) PublicityChair GeraldPfeifer(ViennaUniversityofTechnology,Austria) AdditionalReviewers RobertoBarbuti StefanBrass KrysiaBroda FrancescoBuccafurri CarlosDamasio AlexanderDekhtyar PhanMinhDung UweEgly WolfgangFaber SergioGreco Je Horty KatsumiInoue ConferenceOrganization VII TomiJanhunen ChrisJohnson AntonisKakas HirofumiKatsuno VladimirLifschitz JorgeLobo ThomasLukasiewicz So anMaabout GiuseppeManco VictorMarek CristinelMateis YujiMatsumoto IaraMora MircoNanni LuigiPalopoli LuisMonizPereira GeraldPfeifer InnaPivkina SalvatoreRuggieri FaribaSadri FrancescoScarcello DietmarSeipel HirohisaSeki PatrikSimons TerrySwift HansTompits UlrichZukowski KewenWang TableofContents ContributedPapers FixedParameterComplexityinAIandNonmonotonicReasoning. . . . . . . . . . . 1 G. Gottlob,F. Scarcello,M. Sideri ClassifyingSemi-NormalDefaultLogicontheBasisofitsExpressivePower 19 T. Janhunen LocallyDeterminedLogicPrograms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 D. Cenzer,J. B. Remmel,A. Vanderbilt AnnotatedRevisionPrograms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 V. Marek,I. Pivkina,M. Truszczynski Belief,Knowledge,Revisions,andaSemanticsofNon-MonotonicReasoning63 J. Sefranek AnArgumentationFrameworkforReasoningaboutActionsandChanges . . 78 A. Kakas,R. Miller,F. Toni RepresentingTransitionSystemsbyLogicPrograms . . . . . . . . . . . . . . . . . . . . . . . 92 V. Lifschitz,H. Turner

Contributed Papers.- Fixed-Parameter Complexity in AI and Nonmonotonic Reasoning.- Classifying Semi-Normal Default Logic on the Basis of its Expressive Power.- Locally Determined Logic Programs.- Annotated Revision Programs.- Belief, Knowledge, Revisions, and a Semantics of Non-Monotonic Reasoning.- An Argumentation Framework for Reasoning about Actions and Change.- Representing Transition Systems by Logic Programs.- Transformations of Logic Programs Related to Causality and Planning.- From Causal Theories to Logic Programs (Sometimes).- Monotone Expansion of Updates in Logical Databases.- Updating Extended Logic Programs through Abduction.- LUPS - A Language for Updating Logic Programs.- Pushing Goal Derivation in DLP Computations.- Linear Tabulated Resolution for the Well-Founded Semantics.- A Case Study in Using Preference Logic Grammars for Knowledge Representation.- Minimal Founded Semantics for Disjunctive Logic Programming.- On the Role of Negation in Choice Logic Programs.- Default Reasoning via Blocking Sets.- Coherent Well-founded Annotated Logic Programs.- Many-Valued Disjunctive Logic Programs with Probabilistic Semantics.- Extending Disjunctive Logic Programming by T-norms.- Extending the Stable Model Semantics with More Expressive Rules.- Stable Model Semantics of Weight Constraint Rules.- Towards First-Order Nonmonotonic Reasoning.- A Comparison of Sceptical NAF-Free Logic Programming Approaches.- Characterizations of Classes of Programs by Three-Valued Operators.- Invited Talks.- Using LPNMR for Problem Specification and Code Generation.- Answer Set Planning.- World-Modeling vs. World-Axiomatizing.- Practical Nonmonotonic Reasoning: Extending Inheritance Techniques to Solve Real-World Problems.