Semantic Web Enabled Web Services 1; Dieter Fensel, Christoph Bussler, Alexander Maedche; The Grid, Grid Services and the Semantic Web:; Technologies and Opportunities 3; Carl Kesselman; Research Papers: Matching RDFGraphs 5; Jeremy J Carroll; Layering the Semantic Web: Problems and Directions 16; Peter F Patel-Schneider, Dieter Fensel; Notions of Indistinguishability for Semantic Web Languages 30; Jaap Kamps, Maarten Marx; The Usable Ontology:; An Environment for Building and Assessing a Domain Ontology 39; Michele Missiko, Roberto Navigli, Paola Velardi; Sesame: A Generic Architecture; for Storing and Querying RDFand RDFSc hema 54; Jeen Broekstra, Arjohn Kampman, Frank van Harmelen; A Formal Model for Topic Maps 69; Pascal Auillans, Patrice Ossona de Mendez, Pierre Rosenstiehl, ; Bernard Vatant; Towards High-Precision Service Retrieval 84; Abraham Bernstein, Mark Klein; Automatic Generation of Java/SQL Based Inference Engines; from RDFSc hema and RuleML 102; Andreas Eberhart; Ontology-Based Integration of XML Web Resources 117; Bernd Amann, Catriel Beeri, Irini Fundulaki, Michel Scholl; XIV Table of Contents; Benchmarking RDFSc hemas for the Semantic Web 132; Aimilia Magkanaraki, So a Alexaki, Vassilis Christophides, ; Dimitris Plexousakis; Building the Semantic Web on XML 147; Peter F Patel-Schneider, Jérôme Siméon; Trusting Information Sources One Citizen at a Time 162; Yolanda Gil, Varun Ratnakar; Querying the Semantic Web: A Formal Approach 177; Ian Horrocks, Sergio Tessaris; Semantic Con guration Web Services in the CAWICOMS Project 192; Alexander Felfernig, Gerhard Friedrich, Dietmar Jannach, ; Markus Zanker; Integrating Vocabularies:; Discovering and Representing Vocabulary Maps 206; Borys Omelayenko; OntoEdit: Collaborative Ontology Development for the Semantic Web 221; York Sure, Michael Erdmann, Juergen Angele, Ste en Staab, ; Rudi Studer, Dirk Wenke; Towards a Modi cation Exchange Language; for Distributed RDFRep ositories 236; Wolfgang Nejdl, Wolf Siberski, Bernd Simon, Julien Tane; Representing Disjunction and Quanti ers in RDF 250; Drew McDermott, Dejing Dou; Towards Semantic Web Mining 264; Bettina Berendt, Andreas Hotho, Gerd Stumme; Bringing Together Semantic Web and Web Services 279; Joachim Peer; Global vs Community Metadata Standards:; Empowering Users for Knowledge Exchange 292; Marek Hatala, Gri R ichards; Taking the RDFMo del Theory Out for a Spin 307; Ora Lassila; Concurrent Execution Semantics of DAML-S with Subtypes 318; Anupriya Ankolekar, Frank Huch, Katia Sycara; Semantic Matching of Web Services Capabilities 333; Massimo Paolucci, Takahiro Kawamura, Terry R Payne, Katia Sycara; Table of Contents XV; DAML-S: Web Service Description for the Semantic Web 348; DAML-S Coalition: Anupriya Ankolekar, Mark Burstein, Jerry R Hobbs, ; Ora Lassila, David Martin, Drew McDermott, Sheila A McIlraith, ; Srini Narayanan, Massimo Paolucci, Terry Payne, Katia Sycara; TRIPLE-A Query, Inference, and Transformation Language; for the Semantic Web 364; Michael Sintek, Stefan Decker; A Data Integration Framework for e-Commerce Product Classi cation 379; Sonia Bergamaschi, Francesco Guerra, Maurizio Vincini; Position Papers: Nonmonotonic Rule Systems on Top of Ontology Layers 394; Grigoris Antoniou; An RDFNetAPI 399; Andy Seaborne; A Mini-experiment in Semantic Annotation 404; Guus Schreiber, Inger I Blok, Daan Carlier, Wouter P C van Gent, ; Jair Hokstam, Uri Roos; SWAD-Europe: Semantic Web Advanced Development in Europe 409; D Brickley, S Buswell, B M Matthews, L Miller, D Reynolds, ; M D Wilson; Preemptive Rei cation 414; Steven R Newcomb; Four Steps Towards the Widespread Adoption of a Semantic Web 419; Brian McBride; System Descriptions: Three Implementations of SquishQL, a Simple RDFQuery Language 423; Libby Miller, Andy Seaborne, Alberto Reggiori; ClaiMaker: Weaving a Semantic Web of Research Papers 436; Gangmin Li, Victoria Uren, Enrico Motta, Simon Buckingham Shum, ; John Domingue; Business and Enterprise Ontology Management with SymOntoX 442; Michele Missiko, Francesco Taglino; Is Participation in the Semantic Web Too Di cult? 448; Stefan Haustein, Jörg Pleumann; XVI Table of Contents; Consistency Checking of Semantic Web Ontologies 454; Kenneth Baclawski, Mieczyslaw M Kokar, Richard Waldinger, ; Paul A Kogut; WebThemeTM: Understanding Web Information through Visual Analytics 460; Mark A Whiting, Nick Cramer; Browsing Schedules - An Agent-Based Approach; to Navigating the Semantic Web 469; Terry R Payne, Rahul Singh and Katia Sycara.