Photo of Olaf Hartig

Olaf Hartig

Senior Associate Professor

I am interested in problems related to the management of data and databases. My focus in this broad context is on data on the Web and on graph data, as well as on problems in which the data is distributed over multiple, autonomous data sources.

Senior Associate Professor in Database and Semantic Technologies

I am a Senior Associate Professor (biträdande professor) at the Department of Computer and Information Science. In addition, I am an Amazon Scholar working with the Neptune graph database team at Amazon Web Services.

I hold a PhD in Computer Science from the Humboldt-Universität zu Berlin, Germany, and have been awarded the academic qualification Docent in Computer Science from Linköping University.

I am interested in problems related to the management of data and databases. My focus in this broad context is on data on the Web and on graph data, as well as on problems in which the data is distributed over multiple, autonomous and/or heterogeneous sources. Regarding these topics, my interests range from systems-building related research (e.g., query processing and query optimization) all the way to theoretical foundations (e.g., complexity and expressive power of query languages).

I was honored with the SWSA Distinguished Dissertation Award in 2015 for my PhD dissertation "Querying a Web of Linked Data: Foundations and Query Execution," and with the 2019 SWSA Ten-Year Award for my paper "Executing SPARQL Queries over the Web of Linked Data" which pioneered the idea of traversal-based query execution as well as querying Linked Data on the Web in general. In addition, I have received eight best paper awards (ESWC 2009, ESWC 2015, ISWC 2017, SEMANTiCS 2018, SEMANTiCS 2019, iiWAS 2020, SEMANTiCS 2021, and CoopIS 2023), and I was selected for the prestigious Wallenberg Academy Fellows program.

I co-organized several international research workshops and conferences. Most notably, I have been research track co-chair of ISWC 2019 and in-use track co-chair of ESWC 2024. In addition, I regularly serve on scientific program committees and have participated as an invited expert in two standardization efforts of the World Wide Web Consortium.

Research groups

The Database and Web Information Systems Group (of ADIT at IDA)

Semantic Web Research Group (at IDA)

Sports Analytics Research Group (at IDA)

My background in brief

Curriculum vitae

CV Olaf Hartig

Teaching

I am also leading the following courses:

  • Databases and Information Security for Bioinformatics TDDE49

 

In addition, I am holding lectures in a number of other courses:

  • Advanced Data Models and Databases TDDD43
  • Information Security TDDD17
  • Perspectives in Computer and Software Technology TDDE25

Publications

Selected publications

Cover of publication ''
Sijin Cheng, Olaf Hartig (2020)

iiWAS '20: The 22nd International Conference on Information Integration and Web-based Applications & Services, Virtual Event / Chiang Mai, Thailand, November 30 - December 2, 2020 Continue to DOI

Cover of publication ''
Olaf Hartig, Ian Letter, Jorge Pérez (2018)

Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence, IJCAI 2018, July 13-19, 2018, Stockholm, Sweden , s.5259-5263 Continue to DOI

Cover of publication ''
Olaf Hartig, Jorge Perez (2018)

WEB CONFERENCE 2018: PROCEEDINGS OF THE WORLD WIDE WEB CONFERENCE (WWW2018) , s.1155-1164 Continue to DOI

List of publications

2024

Huanyu Li, Olaf Hartig, Rickard Armiento, Patrick Lambrix (2024) Ontology-based GraphQL server generation for data access and data integration Semantic Web, p. 1-37 Continue to DOI

2023

Valeria Fionda, Olaf Hartig (2023) Tutorials at The Web Conference 2023 Companion Proceedings of the ACM Web Conference 2023, WWW 2023, Austin, TX, USA, 30 April 2023 - 4 May 2023 Continue to DOI
Shahrzad Khayatbashi, Olaf Hartig, Amin Jalali (2023) Transforming Event Knowledge Graph to Object-Centric Event Logs: A Comparative Study for Multi-dimensional Process Analysis
Ora Lassila, Michael Schmidt, Olaf Hartig, Brad Bebee, Dave Bechberger, Willem Broekema, Ankesh Khandelwal, Kelvin Lawrence, Carlos Manuel Lopez Enriquez, Ronak Sharda, Bryan Thompson (2023) The OneGraph vision: Challenges of breaking the graph model lock-in Semantic Web, Vol. 14, p. 125-134 Continue to DOI
Patrick Lambrix, Rickard Armiento, Huanyu Li, Olaf Hartig, Mina Abd Nikooie Pour, Ying Li (2023) The materials design ontology Semantic Web Continue to DOI

Research

Research news

About the Division of Database and Information Techniques (ADIT)

Colleagues at ADIT

About the Department of Computer and Information Science