School of Advanced Technologies, Asian Institute of Technology
講演題目
Semantic Web and Databases
概要
The Web can reach its foll potential only if it becomes a place where data
can be shared and processed by automated tools as well as by people. The
Semantic Web is a vision aiming at having data on the Web defined and linked
in a way that it can be used by machines not just for display purposes, but
for automation, integration and reuse of data across various applications.
There are therefore common goals, similarity and mutual-influence between
Semantic Web and databases. This presentation will concentrate on how Semantic
Web can make contribution to databases, particolarly in the fields of
conceptual modeling, data/schema integration and query processing. OWL (Web
Ontology Language) is W3C's recommended language for Semantic Web and is based
on a Description Logic. Its expressive power is being extended by
incorporation of roles. However, the roles are mere XMLization of Horn logic;
and thus are not natural and cannot readily deal directly with Web data. OWL
materialized under the framework of XDD ( XML Declarative Description) leads
to a language which can succinctly represent Web data, ontologies, axioms and
constraints. It will be demonstrated how this language is used for conceptual
modeling, integration and query processing of data on the Web.