Summary
RDF provides a way to represent data so that information from multiple sources can be brought together and treated as if they came from a single source. But when we want to use that data, the differences in those sources comes out. For instance, we’d like to be able to write a single query that can fetch related data from all the integrated data sources.
The Semantic Web provides an approach to this problem in the form of modeling languages in which the relationship between data sources can be described. A modeling construct’s meaning is given by the pattern of inferences that can be drawn from it. Information integration can be achieved by invoking inferencing before or during the query process; a query returns not only the asserted ...
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