• NOTAS FINALES
• Horario:
• Programa del Curso
• transparencias clase introductoria
• Donde buscar los papers que deben exponer:
  Int. Conf. Semantic Web (todo)
  WWW Conference (ver tracks de SW)

Charlas

• 13 Octubre:
  • Layering the Semantic Web: Problems and Directions Peter F. Patel-Schneider and Dieter Fensel
    Expone: Renzo Angles
    Abstract The Resource Description Framework and the Resource Description Framework Schema Specification are supposed to be the foundations of the Semantic Web, in that all other Semantic Web languages are to be layered on top of them. It turns out that such a layering cannot be achieved in a straightforward way. This paper describes the problem with the straightforward layering and lays out several alternative layering possibilities. The benefits and drawbacks of each of these possibilities are presented and analyzed.
  • Data Extraction and Label Assignment for Web Databases , J. Wang, F. H. Lochovsky
    Expositor: Oliver Vilca
  • Mining Topic-Specific Concepts and Definitions on the Web ,
    Expone: Carolina Bonacic
    ABSTRACT Traditionally, when one wants to learn about a particular topic, one reads a book or a survey paper. With the rapid expansion of the Web, learning in-depth knowledge about a topic from the Web is becoming increasingly important and popular. In this paper, we attempt a novel and challenging task, mining topic-specific knowledge on the Web. Our goal is to help people learn in-depth knowledge of a topic systematically on the Web. The proposed techniques first identify those sub-topics or salient concepts of the topic, and then find and organize those informative pages, containing definitions and descriptions of the topic and sub-topics, just like those in a book. Experimental results using 28 topics show that the proposed techniques are highly effective.
• 20 Octubre: Ontologías
  • Dynamic Ontologies on the Web, Jeff Heflin and James Hendler
    Expone: Rodrigo González
    ABSTRACT: We discuss the problems associated with managing ontologies in distributed environments such as the Web. The Web poses unique problems for the use of ontologies because of the rapid evolution and autonomy of web sites. We present SHOE, a web-based knowledge representation language that supports multiple versions of ontologies. We describe SHOE in the terms of a logic that separates data from ontologies and allows ontologies to provide different perspectives on the data. We then discuss the features of SHOE that address ontology versioning, the effects of ontology revision on SHOE web pages, and methods for implementing ontology integration using SHOE^Òs extension and version mechanisms.
  • OntoEdit: Collaborative Ontology Development for the Semantic Web,
    Expone: Carlos Acosta
  • Ontology-Based Query and Answering in Chemistry: OntoNova @ Project Halo , J. Angele, E. Moench, H. Oppermann, S. Staab, and D. Wenke
    Expone: Julio Quinteros
• 27 Octubre: P2P, etc.
  • Super-Peer-Based Routing and Clustering Strategies for RDF-Based Peer-To-Peer Networks
    Expositor: Juan Pablo Nuñez
  • EDUTELLA: P2P Networking for the Semantic Web
    Alex Patricio Borquez
  • Bringing together Semantic Web and Web Services , Peer
    Expone: Cristian Aracena
    ABSTRACT: There are diverse efforts to advance the World Wide Web. On one side there is the Semantic Web research, on the other side is the Web Service research. Both activities aim to make content on the web accessible and usable not only for humans but also for machines in order to create a foundation for intelligent automated services and business processes. These two efforts are highly complementary, and there is work in progress towards a unification of them. This paper contributes to this process of unication by presenting a method of connecting Web Services descriptions with Semantic Web ontologies.
  • Agent-based Semantic Web Services, Nicholas Gibbins, Stephen Harris, Nigel Shadbolt
    Expone: Cristian Fuenzalida
    ABSTRACT: The Web Services world consists of loosely-coupled distributed systems which adapt to ad-hoc changes by the use of service descriptions that enable opportunistic service discovery. At present, these service descriptions are semantically impoverished, being concerned with describing the functional signature of the services rather than characterising their meaning. In the Semantic Web community, the DAML Services effort attempts to rectify this by providing a more expressive way of describing Web services using ontologies. However, this approach does not separate the domain-neutral communicative intent of a message (considered in terms of speech acts) from its domain-specific content, unlike similar developments from the multi-agent systems community. In this paper, we describe our experiences of designing and building an ontologically motivated Web Services system for situational awareness and information triage in a simulated humanitarian aid scenario. In particular, we discuss the merits of using techniques from the multi-agent systems community for separating the intentional force of messages from their content, and the implementation of these techniques within the DAML Services model
• 3 Noviembre: final
  • The Chatty Web: Emergent Semantics Through Gossiping, Karl Aberer, Philippe Cudr-Mauroux, Manfred Hauswirth
    Expone: Mauro San Martín
    ABSTRACT: This paper describes a novel approach for obtaining semantic interoperability among data sources in a bottom-up, semi-automatic manner without relying on pre-existing, global semantic models. We assume that large amounts of data exist that have been organized and annotated according to local schemas. Seeing semantics as a form of agreement, our approach enables the participating data sources to incrementally develop global agreement in an evolutionary and completely decentralized process that solely relies on pair-wise, local interactions: Participants provide translations between schemas they are interested in and can learn about other translations by routing queries (gossiping). Our approach applies to any system which provides a communication infrastructure (existing websites or databases, decentralized systems, P2P systems) and offers the opportunity to study semantic interoperability as a global phenomenon in a network of information sharing parties.

  Algunos materiales complementarios para el curso

  • W3C: Consorcio de la Web
  • The Semantic Web: A new form of Web content that is meaningful to computers will unleash a revolution of new possibilities Tim Berners-Lee, James Hendler, Ora Lassila
  • The World Wide Web - Past Present and Future, Tim Berners-Lee (Japan Prize 2002).

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