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The vision of creating a Linked Data Web brings together the challenge of allowing queries across highly heterogeneous and distributed datasets. In order to query Linked Data on the Web today, end-users need to be aware of which datasets potentially contain the data and also which data model describes these datasets. The process of allowing users to expressively query relationships in RDF while abstracting them from the underlying data model represents a fundamental problem for Web-scale Linkeddoi:10.1109/icsc.2011.89 dblp:conf/semco/FreitasOCO11 fatcat:wtl3o2ar7jhrbptp36ihkwiqt4