Information Systems Group

― Knowledge Representation and Reasoning



SumRDF is a system for estimating the size of conjunctive queries over RDF graphs using a novel technique based on graph summarisation. On this webpage you can find all the material related to our VLDB submission.


  • Technical Report: PDF

  • Prototype and Test Data: Our prototypical implementation of SumRDF, the datasets, the queries, and the results of our measurements are available in ZIP format here. The archive contains a runnable jar file (SumRDF-bin.jar) that can be directly executed following the instructions in the README file.


Giorgio Stefanoni, Boris Motik, Egor V. Kostylev.

Key Publications

Giorgio Stefanoni, Boris Motik, and Egor V. Kostylev. Estimating the Cardinality of Conjunctive Queries over RDF Data Using Graph Summarisation. Submitted to VLDB.