DEXA Workshop on Web Semantics (WebS'02),
Proc. DEXA 2002 Workshop, IEEE Computer Society Press,
Linking the Semantic Web with Existing Sources
The Semantic Web aims at providing Web data sources on a
semantic level. On the other hand, most of the Web data itself is
not suitably prepared (e.g., by annotations). In this paper, we
describe a semantic layer that integrates existing data sources
with the Semantic Web by combining semantic modeling with links that
associate the semantic notions with actual data on the Web. The
semantic level consists of specialized service providers - which
can be seen as agents - for each application domain. Each agent
contains ontological knowledge represented in XML where the links to
the actual data are embedded as XPath expressions, similar to XLink.
The agent uses its knowledge with an internal reasoning mechanism to
combine the links for translating a Semantic Web query into a Web
query that is then evaluated against the individual sources.