Sebastian Schaffert

My current research is focused on Semantic Web technologies, in particular knowledge management, learning, social software, and reasoning. Recently, I have been working on a “semantic wiki” system called IkeWiki. Together with Max Völkel and some others, I have also initiated the Semantic Wiki Interest Group. I am furthermore workshop chair of the first workshop on semantic wiki systems co-located with the European Semantic Web Conference in Budva, Montenegro, and programme chair of the I-Semantics conference series (2006 Vienna, 2007 and 2008 Graz). Before, I have been working on Xcerpt, which is a declarative, rule-based language for querying and transforming XML and semistructured data (see my PhD thesis below). Xcerpt is now further developed as part of the REWERSE Network of Excellence.

See my DBLP entry and my Google Scholar list.

All documents on this page are © Sebastian Schaffert and may be distributed under a Creative Commons License.

PhD Thesis

Sebastian Schaffert: Xcerpt: A Rule-Based Query and Transformation Language for the Web. PhD dissertation, University of Munich, October 2004 (PDF Text, 2.2MB, PDF Slides, 640kB, German

2009

• Sebastian Schaffert, François Bry, Joachim Baumeister, Malte Kiesel: Semantische Wikis. In: Tassilo Pellegrini and Andreas Blumauer (eds): Social Semantic Web, 2009: 245-258
• Christoph Wieser, Sebastian Schaffert: Die Zeitung der Zukunft. In: Tassilo Pellegrini and Andreas Blumauer (eds): Social Semantic Web 2009: 423-434
• Sebastian Schaffert, Julia Eder, Szaby Grünwald, Thomas Kurz, Mihai Radulescu, Rolf Sint, and Stephanie Stroka. KiWi – A Platform for Semantic Social Software. In: 4th Workshop on Semantic Wikis (SemWiki2009) at ESWC09, Heraklion, Greece, June 2009 (PDF).
• Sebastian Schaffert, Julia Eder, Szaby Grünwald, Thomas Kurz, and Mihai Radulescu. KiWi – A Platform for Semantic Social Software (Demonstration) – short version/demo description of previous publication. In: 6th European Semantic Web Conference (ESWC09) – Demonstrations Track, Heraklion, Greece, June 2009 (PDF). ESWC Best Demo Award!
• Tassilo Pellegrini, Sören Auer, Klaus Tochtermann and Sebastian Schaffert: Networked Knowledge – Networked Media: Integrating Knowledge Management, New Media Technologies and Semantic Systems. Springer Studies in Computational Intelligence. July 2009. ISBN: 3642021832

2008

• Sebastian Schaffert, Joachim Baumeister, François Bry, and Malte Kiesel Semantic Wikis . In: IEEE Software, vol. 25, no. 4, pp. 8-11, Jul/Aug, 2008 (PDF).
• Peter Dolog, Markus Krötzsch, Sebastian Schaffert, and Denny Vrandecic: Proceedings of the Workshop on Social Web and Knowledge Management (SWKM08). In: WWW2008, Beijing, China, April 2008.
• Christoph Lange, Max Völkel, Hala Skaf-Molli, and Sebastian Schaffert: Proceedings of the 3rd Workshop on Semantic Wikis (SemWiki08) (CEUR). In: ESWC’08, Tenerife, Spain, June 2008.
• Cristina Baroglio, Piero A. Bonatti, Jan Maluszynski, Massimo Marchiori, Axel Polleres, Sebastian Schaffert: Reasoning Web, 4th International Summer School 2008, Venice, Italy, September 7-11, 2008, Tutorial Lectures Springer 2008

2007

• François Bry, Tim Furche, Liviu Badea, Christoph Koch, Sebastian Schaffert, and Sacha Berger: Querying the Web Reconsidered: Design Principles for Versatile Web Query Languages . In: Amit Seth, Miltiadis D. Lytras (eds.): Semantic Web-Based Information Systems—State-of-the-Art Applications. Idea Group Inc.,, December 2007.
• Markus Krötzsch, Sebastian Schaffert, and Denny Vrandecic Reasoning in Semantic Wikis . In: Reasoning Web Summer School, Dresden, September 2007. Springer-Verlag, LNCS 4636
• Sebastian Schaffert and Tassilo Pellegrini: Proceedings of the I-SEMANTICS 2007 as part of Triple-I 2007 JUCS, ISSN 0948-6968, September 2006
• Sebastian Schaffert, François Bry, Joachim Baumeister und Malte Kiesel Aktuelles Schlagwort: Semantic Wiki . In: Informatik Spektrum, Organ der Gesellschaft für Informatik e.V. und mit ihr assoziierter Organisationen, ISSN: 0170-6012
• Sebastian Schaffert: Semantic Social Software: Semantically Enabled Social Software or Socially Enabled Semantic Web? . In: Emerging Technologies For Semantic Work Environments, ISBN: 1599048779
• Eyal Oren, Sebastian Schaffert, and Max Völkel: Personal Knowledge Management with Semantic Technologies. In: Emerging Technologies For Semantic Work Environments, ISBN: 1599048779

2006

• Sebastian Schaffert, Andreas Gruber, and Rupert Westenthaler: A Semantic Wiki for Collaborative Knowledge Formation . In: Semantics 2005, Vienna, Austria, November 2005 (published by Trauner Verlag, 2006).
• Sebastian Schaffert: IkeWiki: A Semantic Wiki for Collaborative Knowledge Management. . In: 1st International Workshop on Semantic Technologies in Collaborative Applications STICA 06, Manchester, UK, June 2006.
• Sacha Berger, François Bry, Tim Furche, Benedikt Linse, and Sebastian Schaffert: The Web and Semantic Web Query Language Xcerpt . In: Semantic Web Factbook, 2006
• Sebastian Schaffert, Diana Bischof, Tobias Bürger, Andreas Gruber, Wolf Hilzensauer, and Sandra Schaffert: Learning with Semantic Wikis . In: First Workshop “SemWiki2006 – From Wiki to Semantics”, co-located with the 3rd Annual European Semantic Web Conference (ESWC), Budva, Montenegro, 11th – 14th June, 2006
• N. Ferran, J. Minguillón, M. Pascual, C. Barragán, A. Canals, G. Geser, A. Gruber, V. Hornung-Prähauser, S. Schaffert, P. Baumgartner, V. Naust-Schulz, L. Pullich, S. Lamminnen, A. Koivisto, T. Väliharju: The Concept of Open Educational Resources as Instrument for Implementing Lifelong Learning Strategies at Higher and Further Education Institutions . In: EDEN 2006 Annual Conference, Vienna, June 2006
• Sebastian Schaffert, Rupert Westenthaler, and Andreas Gruber: IkeWiki: A User-Friendly Semantic Wiki . In: 3rd European Semantic Web Conference (ESWC06) – Demonstrations Track, Budva, Montenegro, June 2006
• Wolf Hilzensauer, Veronika Hornung-Prähauser, and Sebastian Schaffert: Requirements for Personal Development Planning in ePortfolios supported by Semantic Web Technology . In: I-Know 2006, Graz, Austria, September 2006
• Sebastian Schaffert: Semantic Social Software: Semantically Enabled Social Software or Socially Enabled Semantic Web? . August 2006
• Max Völkel and Sebastian Schaffert: Proceedings of the First Workshop on Semantic Wikis – From Wiki to Semantics . CEUR Workshop Proceedings Vol. 206, ISSN 1613-0073, June 2006
• Sebastian Schaffert and York Sure: Semantic Systems: From Visions to Applications – Proceedings of the SEMANTICS 2006 OCG Books, ISBN 3-85403-212-9, November 2006

2005

• François Bry, Tim Furche, Liviu Badea, Christoph Koch, Sebastian Schaffert, and Sacha Berger: Querying the Web Reconsidered: Design Principles for Versatile Web Query Languages. In: Journal of Semantic Web and Information Systems (IJSWIS) 1 (2), April 2005.
• Sacha Berger, François Bry, Oliver Bolzer, Tim Furche, Sebastian Schaffert, and Christoph Wieser: Querying the standard and Semantic Web using Xcerpt and visXcerpt. In: Proceedings of European Semantic Web Conference (ESWC’05), Heraklion, Crete, Greece, May 2005
• James Bailey, François Bry, Tim Furche, and Sebastian Schaffert: Web and Semantic Web Query Languages: A Survey. In: Reasoning Web, First International Summer School 2005 (LNCS 3564), Malta, July 2005.
• Erich Schubert, Sebastian Schaffert, and François Bry: Structure-Preserving Difference Search for XML Documents. In: Proceedings of Extreme Markup Languages 2005, Montréal, Québec, Canada, August 2005.
• S. Schaffert, F. Bry, P. Besnard, H. Decker, S. Decker, C. Enguix, A. Herzig: Paraconsistent Reasoning for the Semantic Web (Position Paper). In: Workshop on Uncertainty Reasoning for the Semantic Web (URSW05) at ISWC05, Galway, Ireland, November 2005.

2004

• François Bry, Sebastian Schaffert and Andreas Schroeder: A contribution to the Semantics of Xcerpt, a Web Query and Transformation Language. In: Proceedings of WLP04 (Workshop Logische Programmierung), Potsdam, Germany, March 2004
• Sacha Berger, François Bry, and Sebastian Schaffert: Xcerpt und visXcerpt: deduktive Anfragesprachen für das Web. In: 16. Workshop Grundlagen von Datenbanken, Monheim am Rhein, Germany, June 2004
• Sacha Berger, François Bry, and Sebastian Schaffert: Xcerpt et visXcerpt : Langages déductifs d’interrogation du Web. In: Treiziemes Journées Francophones de Programmation en Logique et Programmation par Contraintes (JFPLC’2004), Angers, France, June 2004
• Sebastian Schaffert and François Bry: Querying the Web Reconsidered – A Practical Introduction to Xcerpt. In: Extreme Markup Languages 2004, Montréal, Canada, August 2004
• François Bry, Sebastian Schaffert, and Paula-Lavinia Pătrânjan: Xcerpt and XChange: Deductive Languages for Data Retrieval and Evolution on the Web. In: Workshop on Semantic Web Services and Dynamic Networks (SWSDN2004), Ulm, Germany, September 2004.
• François Bry, Paula-Lavinia Pătrânjan, and Sebastian Schaffert: Poster Presentation: Xcerpt and XChange: Logic Programming Languages for Querying and Evolution on the Web. In: Proceedings of 20th International Conference on Logic Programming (ICLP’04), St.Malo, France, September 2004.
• François Bry, Tim Furche, Paula-Lavinia Pătrânjan, and Sebastian Schaffert: Data Retrieval and Evolution on the (Semantic) Web: A Deductive Approach. In: Proceedings of Workshop on Principles and Practice of Semantic Web Reasoning (PPSWR’04), St.Malo, France, September 2004.
• Sacha Berger, François Bry, Bernhard Lorenz, Hans Jürgen Ohlbach, Paula-Lavinia Pătrânjan, Sebastian Schaffert, Uta Schwertel, and Stephanie Spranger: Reasoning on the Web: Language Prototypes and Perspectives. October 2004
• Sacha Berger, Franois Bry, Oliver Bolzer, Tim Furche, Sebastian Schaffert, and Christoph Wieser: Xcerpt and visXcerpt: Twin Query Languages for the Semantic Web. In: 3rd International Semantic Web Conference (ISWC2004), Hiroshima, Japan, November 2004
• Grigoris Antoniou, Matteo Baldoni, Cristina Baroglio, Robert Baumgartner, François Bry, Thomas Eiter, Nicola Henze, Marcus Herzog, Wolfgang May, Viviana Patti, Roman Schindlauer, Hans Tompits, and Sebastian Schaffert: Reasoning Methods for Personalization on the Semantic Web. In: Annals of Mathematics, Computing & Teleinformatics 2 (1), 1-24. December 2004

2003

• François Bry and Sebastian Schaffert: Pattern Queries for XML and Semistructured Data. In: 17. Workshop Logische Programmierung, Dresden, Germany, January 2003
• Sacha Berger, François Bry, Sebastian Schaffert and Christoph Wieser: Xcerpt and visXcerpt: From Pattern-Based to Visual Querying of XML and Semistructured Data. In: Proceedings of the Intl Conference on Very Large Databases (VLDB03) – Demonstrations Track, Berlin/Germany, September 2003
• François Bry and Sebastian Schaffert: An Entailment for Reasoning on the Web. In: Proceedings of Rules and Rule Markup Languages for the Semantic Web (RuleML’03), Sanibel Island (Florida), USA, October 2003
• Sacha Berger, François Bry and Sebastian Schaffert: A Visual Language for Web Querying and Reasoning. In: Workshop on Principles and Practice of Semantic Web Reasoning at ICLP03, Mumbay, India, December 2003

2002

• François Bry and Sebastian Schaffert: A Gentle Introduction into Xcerpt, a Rule-based Query and Transformation Language for XML (invited paper). In: RuleML Workshop at the 1st International Semantic Web Conference, Sardinia, Italy, June 2002
• François Bry and Sebastian Schaffert: Towards a Declarative Query and Transformation Language for XML and Semistructured Data: Simulation Unification. In: Proceedings of the 18th International Conference on Logic Programming (ICLP), LNCS 2401, Copenhagen, Denmark, July 2002
• François Bry and Sebastian Schaffert: The XML Query Language Xcerpt: Design Principles, Examples, and Semantics. In: Workshop on Web Databases at NETObjectDays’02 – LNCS 2593, Erfurt, Germany, October 2002

2001

• Sebastian Schaffert: Grouping Constructs for Semistructured Data. (Diploma Thesis), April 2001
• François Bry, Michael Kraus, Dan Olteanu, and Sebastian Schaffert: Aktuelles Schlagwort: Semistrukturierte Daten. In: Informatik Spektrum, August 2001
• François Bry, Dan Olteanu, and Sebastian Schaffert: Grouping Constructs for Semistructured Data. In: WebH2001 Workshop at the DEXA Conference, Munich, Germany, September 2001