In short: 
Choosing suitable views to materialize for optimizing SPARQL workload response type using semantic information.

RDFViewS is a system capable of choosing the most suitable views to materialize, in order to minimize the query response time for a speciļ¬c SPARQL query workload, while taking into account the view maintenance cost and storage space constraints. It exploits the available semantic information (eg RDF Schema) to ensure the completeness of the query evaluation.
Demonstrated in the ACM CIKM 2010 conference.

Ioana Manolescu