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<pdf width="1500px">https://ceur-ws.org/Vol-1046/SSWS2013_preface.pdf</pdf>
<pre>
9th International Workshop on Scalable Semantic
  Web Knowledge Base Systems (SSWS 2013)




At the 12th International Semantic Web Conference (ISWC2013),
Sydney, Australia, October, 2013
                     SSWS 2013 PC Co-chairs’ Message


SSWS 2013 is the ninth edition of the successful Scalable Semantic Web Knowledge Base Systems
workshop series. The workshop series is focussed on addressing scalability issues with respect to
the development and deployment of knowledge base systems on the Semantic Web. Typically, such
systems deal with information described in Semantic Web languages such as OWL and RDF(S),
and provide services such as storing, reasoning, querying and debugging. There are two basic re-
quirements for these systems. First, they have to satisfy the applications semantic requirements by
providing sufficient reasoning support. Second, they must scale well in order to be of practical use.
Given the sheer size and distributed nature of the Semantic Web, these requirements impose addi-
tional challenges beyond those addressed by earlier knowledge base systems. This workshop brought
together researchers and practitioners to share their ideas regarding building and evaluating scalable
knowledge base systems for the Semantic Web.
   This year we received 10 submissions. Each paper was carefully evaluated by four workshop
Program Committee members. Based on these reviews, we accepted seven papers for presentation.
We sincerely thank the authors for all the submissions and are grateful for the excellent work by
the Program Committee members.




October 2013                                                                         Thorsten Liebig
                                                                                      Achille Fokoue
Program Committee
Mihaela Bornea                       Adila A. Krisnadhi
IBM Watson Research Center, USA      Wright State University, Ohio, USA

Oscar Corcho                         Thorsten Liebig
Univ. Politecnica de Madrid, Spain   derivo GmbH, Germany

Achille Fokoue                       Ralf Möller
IBM Watson Research Center, USA      Hamburg Univ. of Techn., Germany

Raúl Garcı́a-Castro                 Jeff Z. Pan
Univ. Politecnica de Madrid, Spain   University of Aberdeen, UK

Volker Haarslev                      Bijan Parsia
Condordia University, Canada         University of Manchester, UK

Pascal Hitzler                       Padmashree Ravindra
Wright State University, Ohio, USA   North Carolina State University, USA

Anastasios Kementsietsidis           Mariano Rodriguez
IBM Watson Research Center, USA      Free University of Bolzano, Italy

Pavel Klinov                         Sebastian Rudolph
Ulm University, Germany              Karlsruhe Inst. of Techn., Germany

Spyros Kotoulas                      Takahira Yamaguchi
IBM Watson Research Center, USA      Keio University, Japan


Additional Reviewers
Norman Heino                         Yuan Ren
Leipzig University, Germany          University of Aberdeen, UK

Amit Joshi                           Martin Rezk
Wright State University, Ohio, USA   Free University of Bolzano, Italy

Raghava Mutharaju                    Kejia Wu
Wright State University, Ohio, USA   Condordia University, Canada

Andrea Reale
University of Bologna, Italy
                                                  Table of Contents


Count Aggregation in Semantic Queries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         1
   Bogdan Kostov, Petr Křemen
DistEL: A Distributed EL+ Ontology Classifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .              17
   Raghava Mutharaju, Pascal Hitzler, Prabhaker Mateti
Rule-based Reasoning on Massively Parallel Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                    33
   Martin Peters, Christopher Brink, Sabine Sachweh, Albert Zündorf

TripleRush: A Fast and Scalable Triple Store . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           50
   Philip Stutz, Mihaela Verman, Lorenz Fischer, Abraham Bernstein
Eviction Strategies for Semantic Flow Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .               66
   Minh Khoa Nguyen, Thomas Scharrenbach, Abraham Bernstein

Scalable Linked Data Stream Processing via Network-Aware Workload Scheduling . . . . . . . . .                                             81
   Lorenz Fischer, Thomas Scharrenbach, Abraham Bernstein
A Distributed Directory System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   97
   Fausto Giunchiglia, Alethia Hume

</pre>