Federated Data Management and Query Optimization for Linked Open Data by Olaf Görlitz and Steffen Staab and,
A Database Perspective on Consuming Linked Data on the Web by Olaf Hartig and Andreas Langegger,
are two recent publications on querying linked data that will repay close study as we prepare to discuss TMQL in Leipzig.
Linked data is a way of organizing subjects. A way that topic maps will encounter in the (still) heterogeneous world.