Homepage of Olaf Hartig

About Me

Welcome to my homepage. Currently I'm working as a research assistant in the Databases and Information Systems group at the Department of Computer Science, Humboldt-Universität zu Berlin.

• My EMail Address: hartig at informatik.hu-berlin.de
• My PGP Key: http://www.informatik.hu-berlin.de/~hartig/hartig.asc
• My FOAF File: http://www.informatik.hu-berlin.de/~hartig/foaf.rdf

Research Interests

• Trustworthiness of Data on the Web
• Web Data Provenance
• Processing Queries over Data from the Web
• Query Processing for RDF Knowledge Bases
• Privacy Issues in the Semantic Web
• Semantic Web Enabled Software Engineering

Projects

Current Projects

• Web of Trusted Data
• SQUIN (The Semantic Web Query Interface)
• Web of Data based Navigation System

Past Projects

• DESWAP (Development Environment for Semantic Web Applications)

Publications

• Olaf Hartig, Christian Bizer, and Johann-Christoph Freytag: Executing SPARQL Queries over the Web of Linked Data. In Proceedings of the 8th International Semantic Web Conference (ISWC), Washington, DC, USA, Oct. 2009
• Olaf Hartig and Jun Zhao: Using Web Data Provenance for Quality Assessment. In Proceedings of the 1st Int. Workshop on the Role of Semantic Web in Provenance Management (SWPM) at the International Semantic Web Conference (ISWC), Washington, DC, USA, Oct. 2009
• Olaf Hartig: Querying Trust in RDF Data with tSPARQL. In Proceedings of the 6th European Semantic Web Conference (ESWC), Heraklion, Greece, Jun. 2009 (Best Paper Award winner)
• Olaf Hartig, Hannes Mühleisen, and Johann-Christoph Freytag: Linked Data for Building a Map of Researchers (Scripting Challenge Submission). In Proceedings of the 5th Workshop on Scripting for the Semantic Web (SFSW) at the European Semantic Web Conference (ESWC), Heraklion, Greece, Jun. 2009
• Olaf Hartig: Provenance Information in the Web of Data. In Proceedings of the Linked Data on the Web (LDOW) Workshop at the World Wide Web Conference (WWW), Madrid, Spain, Apr. 2009
• Olaf Hartig, Martin Kost, and Johann-Christoph Freytag: Automatic Component Selection with Semantic Technologies. Proceedings of the 4th International Workshop on Semantic Web Enabled Software Engineering (SWESE) at the 7th International Semantic Web Conference (ISWC), Karlsruhe, Germany, Oct. 2008
• Olaf Hartig, Martin Kost, and Johann-Christoph Freytag: Designing Component-Based Semantic Web Applications with DESWAP. Proceedings of the Poster and Demonstration Session at the 7th International Semantic Web Conference (ISWC), Karlsruhe, Germany, Oct. 2008
• Olaf Hartig: Trustworthiness of Data on the Web. In Proceedings of the STI Berlin & CSW PhD Workshop, Berlin, Germany, Sep. 2008
• Olaf Hartig and Ralf Heese: The SPARQL Query Graph Model for Query Optimization. In Proceedings of the 4th European Semantic Web Conference (ESWC), Innsbruck, Austria, Jun. 2007
• Olaf Hartig: Grundlagen regelbasierter Optimierung für SPARQL. Diploma Thesis, Humboldt-Universität zu Berlin, 2006

Teaching

• Winter 2009/2010: Practical for the Course "Implementation of Databases"
• Winter 2009/2010: Practical for the Course "Introduction to Databases"
• Summer 2009: Seminar "Web Search"
• Winter 2008/2009: Seminar "SPARQL - Querying the Web of Data"
• Winter 2008/2009: Practical for the Course "Introduction to Databases"
• Summer 2008: Practical for the Course "Implementation of Databases"
• Winter 2007/2008: Practical for the Course "Introduction to Databases"

Program Committees

• 15th International Conference on Information Quality (ICIQ), November 2010, Little Rock, Arkansas, USA
• Triplification Challenge 2010 at I-Semantics, September 2010, Graz, Austria
• 6th International Conference on Semantic Systems (I-Semantics), September 2010, Graz, Austria
• 3rd International Provenance and Annotation Workshop (IPAW), June 2010, Troy, New York, USA
• 7th Extended Semantic Web Conference (ESWC), In Use Track, June 2010, Heraklion, Greece
• 2nd Workshop on Trust and Privacy on the Social and Semantic Web (SPOT), June 2010, Heraklion, Greece
• 3rd Linked Data on the Web Workshop (LDOW), April 2010, Raleigh, North Carolina, USA
• 2nd Social Data on the Web Workshop (SDoW), October 2009, Washington DC, USA
• 5th International Conference on Semantic Systems (I-Semantics), September 2009, Graz, Austria
• 2nd Linked Data on the Web Workshop (LDOW), April 2009, Madrid, Spain

Aditional Activities

• Invited Expert in the W3C Provenance Incubator Group
• Presenter of the tutorial "How to Consume Linked Data on the Web" at the 8th International Semantic Web Conference (ISWC), October 2009, Washington DC, USA
• Presenter of the tutorial "How to Publish Linked Data on the Web" at the 7th International Semantic Web Conference (ISWC), October 2008, Karlsruhe, Germany