RWTH Aachen University
In March 2013, the W3C recommended SPARQL to retrieve and manipulate decentralized RDF (Resource Description Framework) data. Real-world usage requires advanced features of SPARQL recommendations. As these are not consistently implemented, the authors propose a test framework named TFT (Tests For Triple stores) to test the interoperability of the SPARQL endpoint of RDF database systems. This framework can execute the W3C's SPARQL 1.1 test suite and also its own tests of interoperability. To help the developers and end-users of RDF databases, they perform daily tests on Jena-Fuseki, Marmotta-KiWistore, 4Store and three other commercial databases.