CC52U Semántica e Información en la Web
Administrativia Segundo semestre 2003:
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.
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