Prof. Dr. Jens Lehmann

Full Professor
Computer Science Institute
U
niversity of Bonn

Lead Scientist & Coordinator of Dresden Branch
NetMedia Department
Fraunhofer IAIS

Member of Institute for Applied Informatics, Dresden / Leipzig

Profiles: LinkedIn, Google Scholar, DBLP, RDF Web-ID

Offices

Room 1.022
Endenicher Allee 19a, 53115 Bonn, Germany
University of Bonn, Computer Science
Tel:+49 228 73-4315

Zwickauer Straße 46
01069 Dresden, Germany
Fraunhofer IAIS

Short CV


Prof. Dr. Jens Lehmann (http://www.jens-lehmann.org) leads the „Smart Data Analytics“ research group at the University of Bonn and Fraunhofer IAIS with approximately 40 researchers and is lead scientist at Fraunhofer IAIS in the Enterprise Information Systems department. His research interests involve Semantic Web, machine learning, question answering & dialogue systems, distributed computing and knowledge representation. Prof. Lehmann authored more than 120 articles in international journals and conferences, 50 of those in A level venues winning 12 best paper awards. His articles are cited more than 20000 times. In several major conferences and journals, he has leading positions. He is founder, leader or contributor of several community research projects, including SANSA, AskNow, DL-Learner, DBpedia and LinkedGeoData. Previously, he completed his PhD with „summa cum laude“ at the University of Leipzig with visits to the University of Oxford.

Research Interests


  • Machine Learning
  • Semantic Web & Knowledge Graphs
  • Conversational AI

Publications


274 entries « 5 of 6 »

2013

Lehmann, Jens; Höffner, Konrad; Prätor, Sandra; Lehmann, Stephanie; Ngomo, Axel-Cyrille Ngonga; Garcia-Rojas, Alejandra; Athanasiou, Spiros

GeoKnow: Geo-Anwendungen im Daten-Web Journal Article

In: gis.Business, (5), pp. 48–51, 2013.

BibTeX

Proceedings of the 2nd Knowledge Discovery and Data Mining Meets Linked Open Data (Know@LOD) Workshop in conjuction with the Extended Semantic Web Conference (ESWC) 2013. Proceeding

CEUR-WS.org, 992 , 2013.

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Lyko, Klaus; Höffner, Konrad; Speck, René; Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens

SAIM - One Step Closer to Zero-Configuration Link Discovery Inproceedings

In: The Semantic Web: ESWC 2013 Satellite Events - ESWC 2013 Satellite Events, Montpellier, France, May 26-30, 2013, Revised Selected Papers, pp. 167–172, Springer, 2013.

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Zaveri, Amrapali; Nowick, Katja; Lehmann, Jens

Towards Biomedical Data Integration for Analyzing the Evolution of Cognition Inproceedings

In: Informatik 2013, 43. Jahrestagung der Gesellschaft für Informatik e.V. (GI), Informatik angepasst an Mensch, Organisation und Umwelt, 16.-20. September 2013, Koblenz, Deutschland, pp. 1900–1907, GI, 2013.

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Zaveri, Amrapali; Kontokostas, Dimitris; Sherif, Mohamed Ahmed; Bühmann, Lorenz; Morsey, Mohamed; Auer, Sören; Lehmann, Jens

User-driven quality evaluation of DBpedia Inproceedings

In: I-SEMANTICS 2013 - 9th International Conference on Semantic Systems, ISEM '13, Graz, Austria, September 4-6, 2013, pp. 97–104, ACM, 2013.

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Ermilov, Ivan; Martin, Michael; Lehmann, Jens; Auer, Sören

Linked Open Data Statistics: Collection and Exploitation Inproceedings

In: Knowledge Engineering and the Semantic Web - 4th International Conference, KESW 2013, St. Petersburg, Russia, October 7-9, 2013. Proceedings, pp. 242–249, Springer, 2013.

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Höffner, Konrad; Unger, Christina; Bühmann, Lorenz; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga; Gerber, Daniel; Cimiano, Philipp

User Interface for a Template Based Question Answering System Inproceedings

In: Knowledge Engineering and the Semantic Web - 4th International Conference, KESW 2013, St. Petersburg, Russia, October 7-9, 2013. Proceedings, pp. 258–264, Springer, 2013.

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Kontokostas, Dimitris; Zaveri, Amrapali; Auer, Sören; Lehmann, Jens

TripleCheckMate: A Tool for Crowdsourcing the Quality Assessment of Linked Data Inproceedings

In: Knowledge Engineering and the Semantic Web - 4th International Conference, KESW 2013, St. Petersburg, Russia, October 7-9, 2013. Proceedings, pp. 265–272, Springer, 2013.

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Lehmann, Jens; Nguyen, Tri Quan; Ermilov, Timofey

Can We Create Better Links by Playing Games? Inproceedings

In: 2013 IEEE Seventh International Conference on Semantic Computing, Irvine, CA, USA, September 16-18, 2013, pp. 322–329, IEEE Computer Society, 2013.

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Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens; Hassan, Mofeed M.

Towards Transfer Learning of Link Specifications Inproceedings

In: 2013 IEEE Seventh International Conference on Semantic Computing, Irvine, CA, USA, September 16-18, 2013, pp. 202–205, IEEE Computer Society, 2013.

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Shekarpour, Saeedeh; Höffner, Konrad; Lehmann, Jens; Auer, Sören

Keyword Query Expansion on Linked Data Using Linguistic and Semantic Features Inproceedings

In: 2013 IEEE Seventh International Conference on Semantic Computing, Irvine, CA, USA, September 16-18, 2013, pp. 191–197, IEEE Computer Society, 2013.

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Acosta, Maribel; Zaveri, Amrapali; Simperl, Elena; Kontokostas, Dimitris; Auer, Sören; Lehmann, Jens

Crowdsourcing Linked Data Quality Assessment Inproceedings

In: The Semantic Web - ISWC 2013 - 12th International Semantic Web Conference, Sydney, NSW, Australia, October 21-25, 2013, Proceedings, Part II, pp. 260–276, Springer, 2013.

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Bühmann, Lorenz; Lehmann, Jens

Pattern Based Knowledge Base Enrichment Inproceedings

In: The Semantic Web - ISWC 2013 - 12th International Semantic Web Conference, Sydney, NSW, Australia, October 21-25, 2013, Proceedings, Part I, pp. 33–48, Springer, 2013.

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Hellmann, Sebastian; Lehmann, Jens; Auer, Sören; Brümmer, Martin

Integrating NLP Using Linked Data Inproceedings

In: The Semantic Web - ISWC 2013 - 12th International Semantic Web Conference, Sydney, NSW, Australia, October 21-25, 2013, Proceedings, Part II, pp. 98–113, Springer, 2013.

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Ngomo, Axel-Cyrille Ngonga; Bühmann, Lorenz; Unger, Christina; Lehmann, Jens; Gerber, Daniel

Sorry, i don't speak SPARQL: translating SPARQL queries into natural language Inproceedings

In: 22nd International World Wide Web Conference, WWW '13, Rio de Janeiro, Brazil, May 13-17, 2013, pp. 977–988, International World Wide Web Conferences Steering Committee / ACM, 2013.

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Ngomo, Axel-Cyrille Ngonga; Bühmann, Lorenz; Unger, Christina; Lehmann, Jens; Gerber, Daniel

SPARQL2NL: verbalizing sparql queries Inproceedings

In: 22nd International World Wide Web Conference, WWW '13, Rio de Janeiro, Brazil, May 13-17, 2013, Companion Volume, pp. 329–332, International World Wide Web Conferences Steering Committee / ACM, 2013.

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2012

Proceedings of the 1st Knowledge Discovery and Data Mining Meets Linked Open Data (Know@LOD) Workshop in conjuction with the Extended Semantic Web Conference (ESWC) 2012. Proceeding

CEUR-WS.org, 868 , 2012.

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Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens; Auer, Sören; Höffner, Konrad

RAVEN -- Towards Zero-Configuration Link Discovery Technical Report

2012.

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Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens; Auer, Sören; Höffner, Konrad

RAVEN---Towards Zero-Configuration Link Discovery Technical Report

2012.

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Günes, Ömer Farukhan; Furche, Tim; Schallhart, Christian; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga

EAGER: Extending Automatically Gazetteers for Entity Recognition Inproceedings

In: Proceedings of the 3rd Workshop on the People's Web Meets NLP: Collaboratively Constructed Semantic Resources and their Applications to NLP@ACL 2012, Jeju, Republic of Korea, July 13, 2012, pp. 29–33, Association for Computational Linguistics, 2012.

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Cherix, Didier; Hellmann, Sebastian; Lehmann, Jens

Improving the Performance of the DL-Learner SPARQL Component for Semantic Web Applications Inproceedings

In: Semantic Technology, Second Joint International Conference, JIST 2012, Nara, Japan, December 2-4, 2012. Proceedings, pp. 332–337, Springer, 2012.

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Hellmann, Sebastian; Lehmann, Jens; Unbehauen, Jörg; Stadler, Claus; Lam, Thanh Nghia; Strohmaier, Markus

Navigation-Induced Knowledge Engineering by Example Inproceedings

In: Semantic Technology, Second Joint International Conference, JIST 2012, Nara, Japan, December 2-4, 2012. Proceedings, pp. 207–222, Springer, 2012.

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Auer, Sören; Demter, Jan; Martin, Michael; Lehmann, Jens

LODStats - An Extensible Framework for High-Performance Dataset Analytics Inproceedings

In: Knowledge Engineering and Knowledge Management - 18th International Conference, EKAW 2012, Galway City, Ireland, October 8-12, 2012. Proceedings, pp. 353–362, Springer, 2012.

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Bühmann, Lorenz; Lehmann, Jens

Universal OWL Axiom Enrichment for Large Knowledge Bases Inproceedings

In: Knowledge Engineering and Knowledge Management - 18th International Conference, EKAW 2012, Galway City, Ireland, October 8-12, 2012. Proceedings, pp. 57–71, Springer, 2012.

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Hellmann, Sebastian; Lehmann, Jens; Auer, Sören

Linked-Data Aware URI Schemes for Referencing Text Fragments Inproceedings

In: Knowledge Engineering and Knowledge Management - 18th International Conference, EKAW 2012, Galway City, Ireland, October 8-12, 2012. Proceedings, pp. 175–184, Springer, 2012.

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Hellmann, Sebastian; Lehmann, Jens; Auer, Sören; Nitzschke, Marcus

NIF Combinator: Combining NLP Tool Output Inproceedings

In: Knowledge Engineering and Knowledge Management - 18th International Conference, EKAW 2012, Galway City, Ireland, October 8-12, 2012. Proceedings, pp. 446–449, Springer, 2012.

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Guéret, Christophe; Groth, Paul T.; Stadler, Claus; Lehmann, Jens

Assessing Linked Data Mappings Using Network Measures Inproceedings

In: The Semantic Web: Research and Applications - 9th Extended Semantic Web Conference, ESWC 2012, Heraklion, Crete, Greece, May 27-31, 2012. Proceedings, pp. 87–102, Springer, 2012.

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Auer, Sören; Bühmann, Lorenz; Dirschl, Christian; Erling, Orri; Hausenblas, Michael; Isele, Robert; Lehmann, Jens; Martin, Michael; Mendes, Pablo N.; Nuffelen, Bert Van; Stadler, Claus; Tramp, Sebastian; Williams, Hugh

Managing the Life-Cycle of Linked Data with the LOD2 Stack Inproceedings

In: The Semantic Web - ISWC 2012 - 11th International Semantic Web Conference, Boston, MA, USA, November 11-15, 2012, Proceedings, Part II, pp. 1–16, Springer, 2012.

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Lehmann, Jens; Furche, Tim; Grasso, Giovanni; Ngomo, Axel-Cyrille Ngonga; Schallhart, Christian; Sellers, Andrew Jon; Unger, Christina; Bühmann, Lorenz; Gerber, Daniel; Höffner, Konrad; Liu, David; Auer, Sören

deqa: Deep Web Extraction for Question Answering Inproceedings

In: The Semantic Web - ISWC 2012 - 11th International Semantic Web Conference, Boston, MA, USA, November 11-15, 2012, Proceedings, Part II, pp. 131–147, Springer, 2012.

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Lehmann, Jens; Gerber, Daniel; Morsey, Mohamed; Ngomo, Axel-Cyrille Ngonga

DeFacto - Deep Fact Validation Inproceedings

In: The Semantic Web - ISWC 2012 - 11th International Semantic Web Conference, Boston, MA, USA, November 11-15, 2012, Proceedings, Part I, pp. 312–327, Springer, 2012.

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Unger, Christina; Bühmann, Lorenz; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga; Gerber, Daniel; Cimiano, Philipp

Template-based question answering over RDF data Inproceedings

In: Proceedings of the 21st World Wide Web Conference 2012, WWW 2012, Lyon, France, April 16-20, 2012, pp. 639–648, ACM, 2012.

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Morsey, Mohamed; Lehmann, Jens; Auer, Sören; Stadler, Claus; Hellmann, Sebastian

DBpedia and the live extraction of structured data from Wikipedia Journal Article

In: Program, 46 (2), pp. 157–181, 2012.

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Stadler, Claus; Lehmann, Jens; Höffner, Konrad; Auer, Sören

LinkedGeoData: A core for a web of spatial open data Journal Article

In: Semantic Web, 3 (4), pp. 333–354, 2012.

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Morsey, Mohamed; Lehmann, Jens; Auer, Sören; Ngomo, Axel-Cyrille Ngonga

Usage-Centric Benchmarking of RDF Triple Stores Inproceedings

In: Proceedings of the Twenty-Sixth AAAI Conference on Artificial Intelligence, July 22-26, 2012, Toronto, Ontario, Canada, AAAI Press, 2012.

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Hellmann, Sebastian; Stadler, Claus; Lehmann, Jens

The German DBpedia: A Sense Repository for Linking Entities Incollection

In: Linked Data in Linguistics - Representing and Connecting Language Data and Language Metadata, pp. 181–190, Springer, 2012.

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2011

Guéret, Christophe; Groth, Paul; Stadler, Claus; Lehmann, Jens

Linked Data Quality Assessment through Network Analysis Inproceedings

In: ISWC 2011 Posters and Demos, 2011.

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Hellmann, Sebastian; Lehmann, Jens; Auer, Sören

Learning of OWL Class Expressions on Very Large Knowledge Bases and its Applications. Incollection

In: Learning of OWL Class Expressions on Very Large Knowledge Bases and its Applications, pp. 104-130, IGI Global, 2011.

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Lehmann, Jens; Bühmann, Lorenz

AutoSPARQL: Let Users Query Your Knowledge Base Inproceedings

In: The Semantic Web: Research and Applications - 8th Extended Semantic Web Conference, ESWC 2011, Heraklion, Crete, Greece, May 29-June 2, 2011, Proceedings, Part I, pp. 63–79, Springer, 2011.

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Iglesias, Josué; Lehmann, Jens

Towards integrating fuzzy logic capabilities into an ontology-based Inductive Logic Programming framework Inproceedings

In: 11th International Conference on Intelligent Systems Design and Applications, ISDA 2011, Córdoba, Spain, November 22-24, 2011, pp. 1323–1328, IEEE, 2011.

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Morsey, Mohamed; Lehmann, Jens; Auer, Sören; Ngomo, Axel-Cyrille Ngonga

DBpedia SPARQL Benchmark - Performance Assessment with Real Queries on Real Data Inproceedings

In: The Semantic Web - ISWC 2011 - 10th International Semantic Web Conference, Bonn, Germany, October 23-27, 2011, Proceedings, Part I, pp. 454–469, Springer, 2011.

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Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens; Auer, Sören; Höffner, Konrad

RAVEN - active learning of link specifications Inproceedings

In: Proceedings of the 6th International Workshop on Ontology Matching, Bonn, Germany, October 24, 2011, CEUR-WS.org, 2011.

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Zaveri, Amrapali; Pietrobon, Ricardo; Auer, Sören; Lehmann, Jens; Martin, Michael; Ermilov, Timofey

ReDD-Observatory: Using the Web of Data for Evaluating the Research-Disease Disparity Inproceedings

In: Proceedings of the 2011 IEEE/WIC/ACM International Conference on Web Intelligence, WI 2011, Campus Scientifique de la Doua, Lyon, France, August 22-27, 2011, pp. 178–185, IEEE Computer Society, 2011.

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Lehmann, Jens; Auer, Sören; Bühmann, Lorenz; Tramp, Sebastian

Class expression learning for ontology engineering Journal Article

In: J. Web Semant., 9 (1), pp. 71–81, 2011.

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Hellmann, Sebastian; Lehmann, Jens; Auer, Sören

Learning of OWL Class Expressions on Very Large Knowledge Bases and its Applications Incollection

In: Semantic Services, Interoperability and Web Applications - Emerging Concepts, pp. 104–130, CRC Press, 2011.

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2010

Stadler, Claus; Martin, Michael; Lehmann, Jens; Hellmann, Sebastian

Update Strategies for DBpedia Live Inproceedings

In: Proceedings of the Sixth Workshop on Scripting and Development for the Semantic Web, Crete, Greece, May 31, 2010, CEUR-WS.org, 2010.

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Auer, Sören; Weidl, Matthias; Lehmann, Jens; Zaveri, Amrapali; Choi, Key-Sun

I18n of Semantic Web Applications Inproceedings

In: The Semantic Web - ISWC 2010 - 9th International Semantic Web Conference, ISWC 2010, Shanghai, China, November 7-11, 2010, Revised Selected Papers, Part II, pp. 1–16, Springer, 2010.

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Hellmann, Sebastian; Unbehauen, Jörg; Lehmann, Jens

HANNE - A Holistic Application for Navigational Knowledge Engineering Inproceedings

In: Proceedings of the ISWC 2010 Posters & Demonstrations Track: Collected Abstracts, Shanghai, China, November 9, 2010, CEUR-WS.org, 2010.

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Lehmann, Jens; Bühmann, Lorenz

ORE - A Tool for Repairing and Enriching Knowledge Bases Inproceedings

In: The Semantic Web - ISWC 2010 - 9th International Semantic Web Conference, ISWC 2010, Shanghai, China, November 7-11, 2010, Revised Selected Papers, Part II, pp. 177–193, Springer, 2010.

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Lehmann, Jens; Bader, Sebastian; Hitzler, Pascal

Extracting reduced logic programs from artificial neural networks Journal Article

In: Appl. Intell., 32 (3), pp. 249–266, 2010.

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Lehmann, Jens; Hitzler, Pascal

Concept learning in description logics using refinement operators Journal Article

In: Mach. Learn., 78 (1-2), pp. 203–250, 2010.

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274 entries « 5 of 6 »