Title Page -- Contents -- Chapter 1. Introduction -- Chapter 2. State of the Art -- Chapter 3. Objectives and Contributions -- Chapter 4. Problem Formalisation -- Chapter 5. Accessing Distributed RDF Data Stores -- Chapter 6. Evaluation -- Chapter 7. Conclusions and Future Work -- Chapter 8. Updated Discussion -- Chapter A. Appendix A -- References
Summary
During the last years, the amount of RDF data has increased exponentially over the Web, exposed via SPARQL endpoints. These SPARQL endpoints allow users to direct SPARQL queries to the RDF data. Federated SPARQL query processing allows to query several of these RDF databases as if they were a single one, integrating the results from all of them. This is a key concept in the Web of Data and it is also a hot topic in the community. Besides of that, the W3C SPARQL-WG has standardized it in the new Recommendation SPARQL 1.1. This book provides a formalisation of the W3C proposed recommendation. Thi
