Profile

Since August 2013 I am working as a Research Manager at IMC AG in Saarbrücken, Germany. Research Interests and Selected Projects include XML Databases and XML Stream Processing (see the GCX XQuery Engine), SPARQL Query Language and Constraints in RDF (see my PhD thesis for the most central results), SPARQL Benchmarking (see the SP²Bench SPARQL Performance Benchmark), Federated Semantic Data Processing (see the FedX and FedBench projects), Semantic Query Optimization, Constraints, and Chase, and eLearning, Social Learning, MOOCs.