Subject: Semantic Web themamiddag, 7 juni 14:00 From: Lynda Hardman Date: Tue, 28 May 2002 11:04:12 +0200 To: INFWETWG@NIC.SURFNET.NL Graag wil ik dat mensen zich aanmelden wegens het beperkte aantal stoelen in de zaal en het aantal koffie/thee/borrels dat besteld moeten worden. Graag deze bericht verspreiden aan geinteresseerden. Themamiddag "The Semantic Web" Vrijdag 7 juni 2002 Zalencentrum Hoog Brabant Radboudkwartier 23 3511 CC Utrecht Sprekers: Guus Schreiber, SWI, UvA Heiner Stuckenschmidt, AI, VU The Web is not Well-Formed: Issues in Developing a Web Ontology Language Guus Schreiber, SWI, UvA W3C has recently started a new working group to develop a "web ontology language" (nicknamed "OWL") which should enable semantic annotations of web resources in a more formal way than that provided by RDF. In this talk I will look at the issues involved in constructing such a language, using examples from a number of semantic-annotation and -search studies. The main problem is: how can a web ontology language support the required expressivity while still keeping the language within (decidable) logical limits. This is reminiscent of the old neat-versus-scruffy debate in Artificial Intelligence. Semantic Web Languages - Beauties or Beasts? Heiner Stuckenschmidt, AI, VU In this presentation, we discuss the current knowledge representation languages that have been proposed in the context of the Semantic Web. We take the aims of Semantic Web research as a starting point for a critical survey of existing proposals. We point out the benefits of languages such as DAML+OIL in terms of precise semantics and reasoning support. Confronting these languages with the goals of the Semantic Web, we argue that all current proposals still fail to meet some essential requirements such as local containment and robustness of semantics and reasoning, explicit representation of mappings between distributed models and support for model extraction with minimal user interaction. In the last part of the presentation, we will point out research that explicitly addresses the problems mentioned above and discuss the impact of this research on the development of next generation Semantic Web Languages. Agenda 13:30 Welkom koffie/thee 14:00 Guus Schreiber 15:00 pauze 15:30 Heiner Stuckenschmidt 16:30 Discussie 17:00 Borrel tot 17:30 ---***---