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-- Proceedings now available online on Springer Verlag --
3rd International Workshop On

Scalable Semantic Web Knowledge Base Systems
(SSWS '07)

Vilamoura, Algarve, Portugal, Nov 27, 2007

Proceedings will be published by Springer Verlag


This workshop aims at creating a forum for discussing a critical issue for the Semantic Web, that is, scalability. As the Semantic Web evolves, scalability becomes increasingly important. This workshop will focus on addressing of the scalability issue 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 like OWL and RDF(S), and provide services such as storing, reasoning, querying and debugging. There are two basic requirements for these systems. First, they have to satisfy the application’s 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 additional challenges beyond those addressed by earlier knowledge base systems. This has been well recognized by the community. We expect that the above issue is going to challenge the Semantic Web for a long time of period and significant effort is needed in order to tackle the problem.

This workshop seeks to bring together researchers and practitioners to share their recent ideas and progresses towards building scalable knowledge base systems for the Semantic Web. The workshop will be centered on the discussion of three major aspects:

  1. foundations, methods and technologies for pushing forward the state-of-the-art;
  2. performance evaluation and related principles, methodologies and tools;
  3. identification of important issues and future research directions.


Topics of interests for the workshop include, but are not limited to:

  • Reasoning mechanisms, techniques and systems
  • Query evaluation and optimization
  • Performance evaluation and benchmarks
  • Large Semantic Web repositories
  • Distributed and concurrent knowledge base systems and P2P systems
  • Large scale knowledge base management
  • Semantic Web-based information integration
In addition, the workshop will include a working session on benchmarking and other relevant topics solicited beforehand to participants. In order to be able to evaluate scalability, the existence of agreed benchmarking datasets is of crucial importance. In many related domains such as databases and theorem proving, standard benchmarks exist and are ready to guide research on optimization techniques. In the Semantic Web area, such benchmarking shave only just started to emerge and there is no commonly agreed benchmark dataset for RDF and OWL reasoning and querying. The workshop will address this issue in a special working session on benchmarking. In this session, existing benchmarking initiatives will be presented and discussed by organizers and participants of the workshop. The aim is to agree on a classification of the existing datasets and requirements for additional datasets.


  Abstract Submission Deadline   June 15, 2008 Extended until July 7, 2008
Paper Submission Deadline June 30, 2008 Extended until July 7, 2008
Acceptance Notification August 15, 2008
Camera Ready Due August 25, 2008
Registration Due August 25, 2008
OTM Conferences November 9 - 14, 2008


All submitted papers will be carefully evaluated based on originality, significance, technical soundness, clarity of expression, and relevance to SSWS. All submissions must be in English, and will be refereed by a program committee comprising members of the Working Group. Research submissions must not exceed 10 pages following the Springer format. Submissions should be made in PDF format. Detailed formatting instructions can be found at:

The final proceedings will be published by Springer Verlag as LNCS. Failure to commit to presentation at the conference automatically excludes a paper from the proceedings.

The paper submission site is located at


Achille Fokoue
IBM T.J. Watson Research Center, NY, USA (Contact Person)

Yuanbo Guo
Microsoft Corp

Thorsten Liebig
Ulm University, Germany

Bijan Parsia
University of Manchester, UK

Program Committee Members

  • Pascal Hitzler - University of Karlsruhe, Germany
  • York Sure - University of Karlsruhe, Germany
  • Kavitha Srinivas - IBM T.J. Watson Research Center, USA
  • Takahira Yamaguchi - Keio University, Japan
  • Raúl García Castro - Universidad Politecnica de Madrid, Spain
  • Aditya Kalyanpur - IBM T.J. Watson Research Center, USA
  • Oscar Corcho - University of Manchester, UK
  • Jeff Heflin - Lehigh University, USA
  • Ralf Möller - Hamburg University of Technology, Germany
  • Ian Horrocks - University of Manchester, UK
  • Boris Motik - University of Manchester, UK
  • Pierre-Antoine Champin - Lyon 1 University, France
  • Ying Ding - University of Innsbruck, Austria
  • Marko Luther - DoCoMo Eurolabs Munich, Germany
  • Timo Weithöner - Ulm University, Germany
  • Andy Seaborne - Hewlett-Packard, UK
  • Ulrike Sattler - University of Manchester, UK
  • Jan Wielemaker - University of Amsterdam, The Netherlands
  • Volker Haarslev - Condordia University, Canada