Research Interests

Processing Queries over the Web of Linked Data
Information Quality and Trustworthiness of Linked Data
Web Data Provenance
Query Processing for RDF Knowledge Bases
Privacy Issues in the Semantic Web
Semantic Web Enabled Software Engineering

Projects

Current Projects

Past Projects

Database Researchers Map (a Linked Data based mash-up)
Web of Data based Navigation System
DESWAP (Development Environment for Semantic Web Applications)

Selected Publications

This following list contains selected publications. There is also a complete list of all my publications.

Olaf Hartig: SPARQL for a Web of Linked Data: Semantics and Computability. In Proceedings of the 9th Extended Semantic Web Conference (ESWC), Heraklion, Greece, May 2012 ... Extended Version in CoRR (abs/1203.1569)
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 Andreas Langegger: A Database Perspective on Consuming Linked Data on the Web. In Datenbankspektrum, 10(2) Oct. 2010, (Notice, the linked PDF is just a pre-print. The final publication is available at www.springerlink.com.)
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 and Jun Zhao: Publishing and Consuming Provenance Metadata on the Web of Linked Data. In Proceedings of the 3rd International Provenance and Annotation Workshop (IPAW), Troy, New York, USA, Jun. 2010
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

Program Committees

17th International Conference on Information Quality (ICIQ), November 2012, Paris, France
12th International Conference on Web Engineering (ICWE), July 2012, Berlin, Germany
1st Workshop on Methods for Establishing Trust with Open Data (METHOD), July 2012, Izmir, Turkey
4th International Provenance and Annotation Workshop (IPAW), June 2012, Santa Barbara, California, USA
9th Extended Semantic Web Conference (ESWC), May 2012, Heraklion, Greece
3rd International Workshop on the Role of Semantic Web in Provenance Management (SWPM), May 2012, Heraklion, Greece
5th Linked Data on the Web Workshop (LDOW), April 2012, Lyon, France
21th International World Wide Web Conference (WWW), April 2012, Lyon, France
16th International Conference on Information Quality (ICIQ), November 2011, Adelaide, Australia
4th Social Data on the Web Workshop (SDoW), October 2011, Bonn, Germany
7th International Conference on Semantic Systems (I-Semantics), September 2011, Graz, Austria
2nd International Workshop on Traceability and Compliance of Semi-Structured Processes (TC4SP), August 2011, Clermont-Ferrand, France
22nd International Joint Conference on Artificial Intelligence (IJCAI), July 2011, Barcelona, Spain
11th International Conference on Web Engineering (ICWE), June 2011, Paphos, Cyprus (Best Review Award winner)
8th Extended Semantic Web Conference (ESWC), Semantic Data Management Track, June 2011, Heraklion, Greece
4th Linked Data on the Web Workshop (LDOW), March 2011, Hyderabad, India
IUI Workshop on Context-aware Retrieval and Recommendation (CaRR), February 2011, Palo Alto, USA
9th International Semantic Web Conference (ISWC), Poster and Demo Track, November 2010, Shanghai, China
3rd Social Data on the Web Workshop (SDoW), November 2010, Shanghai, China
2nd International Workshop on the Role of Semantic Web in Provenance Management (SWPM), November 2010, Shanghai, China
15th International Conference on Information Quality (ICIQ), November 2010, Little Rock, Arkansas, USA
1st International Workshop on Traceability and Compliance of Semi-Structured Processes (TC4SP), September 2010, Hoboken, NJ, USA
Triplification Challenge 2010 at I-Semantics, September 2010, Graz, Austria
6th International Conference on Semantic Systems (I-Semantics), September 2010, Graz, Austria
2nd Conference on Semantic Technology and Knowledge Engineering (STAKE), July 2010, Kuching, Sarawak, Malaysia
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

Additional Activities

Invited Expert in the W3C Provenance Working Group
Invited Expert in the W3C Provenance Incubator Group
Organizer of the "3rd International Workshop on Consuming Linked Data (COLD)" at the 11th International Semantic Web Conference (ISWC), November 2012, Boston, USA
Organizer of the "2nd Linked Data-a-thon" at the 10th International Semantic Web Conference (ISWC), October 2011, Bonn, Germany
Organizer of the "2nd International Workshop on Consuming Linked Data (COLD)" at the 10th International Semantic Web Conference (ISWC), October 2011, Bonn, Germany
Organizer of the "1st International Workshop on Consuming Linked Data (COLD)" at the 9th International Semantic Web Conference (ISWC), November 2010, Shanghai, China
Research Intern with Talis in Birmingham, UK, Summer 2010
Lecturer at the Indian-Summer School on Linked Data, September 2011, Leipzig, Germany
Tutorial presenter of the tutorial "An Introduction to SPARQL and Queries over Linked Data" at the 12th International Conference on Web Engineering (ICWE), July 2012, Berlin, Germany
Tutorial presenter of the tutorial "How to Consume Linked Data on the Web" at the 19th International World Wide Web Conference (WWW), April 2010, Raleigh, NC, USA
Tutorial 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
Tutorial presenter of the tutorial "How to Publish Linked Data on the Web" at the 7th International Semantic Web Conference (ISWC), October 2008, Karlsruhe, Germany
Semantic Technologies Coordinator of the "9th Extended Semantic Web Conference (ESWC)", May 2012, Heraklion, Greece
Particpant in the Dagstuhl seminar on "Principles of Provenance", February 2012, Schloss Dagstuhl, Germany
Particpant in the Dagstuhl seminar on "Semantic Data Management", April 2012, Schloss Dagstuhl, Germany

Teaching

Summer 2012: Practical for the Course "Foundations of Database Systems"
Summer 2011: Practical for the Course "Foundations of Database Systems"
Winter 2010/2011: Practical for the Course "Introduction to Database Systems"
Summer 2010: Practical for the Course "Foundations of Programming"
Winter 2009/2010: Practical for the Course "Implementation of Database Systems"
Winter 2009/2010: Practical for the Course "Introduction to Database Systems"
Summer 2009: Seminar "Web Search"
Winter 2008/2009: Seminar "SPARQL - Querying the Web of Data"
Winter 2008/2009: Practical for the Course "Introduction to Database Systems"
Summer 2008: Practical for the Course "Implementation of Database Systems"
Winter 2007/2008: Practical for the Course "Introduction to Database Systems"