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 « 3 of 6 »

2017

Sherif, Mohamed Ahmed; Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens

Wombat - A Generalization Approach for Automatic Link Discovery Inproceedings

In: The Semantic Web - 14th International Conference, ESWC 2017, Portorov z, Slovenia, May 28 - June 1, 2017, Proceedings, Part I, pp. 103–119, 2017.

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Stadler, Claus; Lehmann, Jens

JPA Criteria Queries over RDF Data Inproceedings

In: Joint Proceedings of the 2nd RDF Stream Processing (RSP 2017) and the Querying the Web of Data (QuWeDa 2017) Workshops co-located with 14th ESWC 2017 (ESWC 2017), Portoroz, Slovenia, May 28th - to - 29th, 2017, pp. 55–62, CEUR-WS.org, 2017.

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Petzka, Henning; Stadler, Claus; Katsimpras, Georgios; Haarmann, Bastian; Lehmann, Jens

Benchmarking Faceted Browsing Capabilities of Triplestores Inproceedings

In: Proceedings of the 13th International Conference on Semantic Systems, SEMANTICS 2017, Amsterdam, The Netherlands, September 11-14, 2017, pp. 128–135, ACM, 2017.

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Thakkar, Harsh; Keswani, Yashwant; Dubey, Mohnish; Lehmann, Jens; Auer, Sören

Trying Not to Die Benchmarking: Orchestrating RDF and Graph Data Management Solution Benchmarks Using LITMUS Inproceedings

In: Proceedings of the 13th International Conference on Semantic Systems, SEMANTICS 2017, Amsterdam, The Netherlands, September 11-14, 2017, pp. 120–127, ACM, 2017.

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Auer, Sören; Scerri, Simon; Versteden, Aad; Pauwels, Erika; Charalambidis, Angelos; Konstantopoulos, Stasinos; Lehmann, Jens; Jabeen, Hajira; Ermilov, Ivan; Sejdiu, Gezim; Ikonomopoulos, Andreas; Andronopoulos, Spyros; Vlachogiannis, Mandy; Pappas, Charalambos; Davettas, Athanasios; Klampanos, Iraklis A.; Grigoropoulos, Efstathios; Karkaletsis, Vangelis; de Boer, Victor; Siebes, Ronald; Mami, Mohamed Nadjib; Albani, Sergio; Lazzarini, Michele; Nunes, Paulo; Angiuli, Emanuele; Pittaras, Nikiforos; Giannakopoulos, George; Argyriou, Giorgos; Stamoulis, George; Papadakis, George; Koubarakis, Manolis; Karampiperis, Pythagoras; Ngomo, Axel-Cyrille Ngonga; Vidal, Maria-Esther

The BigDataEurope Platform - Supporting the Variety Dimension of Big Data Inproceedings

In: Web Engineering - 17th International Conference, ICWE 2017, Rome, Italy, June 5-8, 2017, Proceedings, pp. 41–59, Springer, 2017.

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Esteves, Diego; Peres, Rafael; Lehmann, Jens; Napolitano, Giulio

Named Entity Recognition in Twitter Using Images and Text Inproceedings

In: Current Trends in Web Engineering - ICWE 2017 International Workshops, Liquid Multi-Device Software and EnWoT, practi-O-web, NLPIT, SoWeMine, Rome, Italy, June 5-8, 2017, Revised Selected Papers, pp. 191–199, Springer, 2017.

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Maheshwari, Gaurav; Trivedi, Priyansh; Sahijwani, Harshita; Jha, Kunal; Dasgupta, Sourish; Lehmann, Jens

SimDoc: Topic Sequence Alignment based Document Similarity Framework Inproceedings

In: Proceedings of the Knowledge Capture Conference, K-CAP 2017, Austin, TX, USA, December 4-6, 2017, pp. 16:1–16:8, ACM, 2017.

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Saleem, Muhammad; Stadler, Claus; Mehmood, Qaiser; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga

SQCFramework: SPARQL Query Containment Benchmark Generation Framework Inproceedings

In: Proceedings of the Knowledge Capture Conference, K-CAP 2017, Austin, TX, USA, December 4-6, 2017, pp. 28:1–28:8, ACM, 2017.

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Ermilov, Ivan; Ngomo, Axel-Cyrille Ngonga; Versteden, Aad; Jabeen, Hajira; Sejdiu, Gezim; Argyriou, Giorgos; Selmi, Luigi; Jakobitsch, Jürgen; Lehmann, Jens

Managing Lifecycle of Big Data Applications Inproceedings

In: Knowledge Engineering and Semantic Web - 8th International Conference, KESW 2017, Szczecin, Poland, November 8-10, 2017, Proceedings, pp. 263–276, Springer, 2017.

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Conrads, Felix; Lehmann, Jens; Saleem, Muhammad; Ngomo, Axel-Cyrille Ngonga

Benchmarking RDF Storage Solutions with IGUANA Inproceedings

In: Proceedings of the ISWC 2017 Posters & Demonstrations and Industry Tracks co-located with 16th International Semantic Web Conference (ISWC 2017), Vienna, Austria, October 23rd - to - 25th, 2017, CEUR-WS.org, 2017.

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Conrads, Felix; Lehmann, Jens; Saleem, Muhammad; Morsey, Mohamed; Ngomo, Axel-Cyrille Ngonga

Iguana: A Generic Framework for Benchmarking the Read-Write Performance of Triple Stores Inproceedings

In: The Semantic Web - ISWC 2017 - 16th International Semantic Web Conference, Vienna, Austria, October 21-25, 2017, Proceedings, Part II, pp. 48–65, Springer, 2017.

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Ermilov, Ivan; Lehmann, Jens; Sejdiu, Gezim; Bühmann, Lorenz; Westphal, Patrick; Stadler, Claus; Bin, Simon; Chakraborty, Nilesh; Petzka, Henning; Saleem, Muhammad; Ngomo, Axel-Cyrille Ngonga; Jabeen, Hajira

The Tale of Sansa Spark Inproceedings

In: Proceedings of the ISWC 2017 Posters & Demonstrations and Industry Tracks co-located with 16th International Semantic Web Conference (ISWC 2017), Vienna, Austria, October 23rd - to - 25th, 2017, CEUR-WS.org, 2017.

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Lehmann, Jens; Sejdiu, Gezim; Bühmann, Lorenz; Westphal, Patrick; Stadler, Claus; Ermilov, Ivan; Bin, Simon; Chakraborty, Nilesh; Saleem, Muhammad; Ngomo, Axel-Cyrille Ngonga; Jabeen, Hajira

Distributed Semantic Analytics Using the SANSA Stack Inproceedings

In: The Semantic Web - ISWC 2017 - 16th International Semantic Web Conference, Vienna, Austria, October 21-25, 2017, Proceedings, Part II, pp. 147–155, Springer, 2017.

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Maheshwari, Gaurav; Dubey, Mohnish; Trivedi, Priyansh; Lehmann, Jens

How to Revert Question Answering on Knowledge Graphs Inproceedings

In: Proceedings of the ISWC 2017 Posters & Demonstrations and Industry Tracks co-located with 16th International Semantic Web Conference (ISWC 2017), Vienna, Austria, October 23rd - to - 25th, 2017, CEUR-WS.org, 2017.

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Maroy, Wouter; Dimou, Anastasia; Kontokostas, Dimitris; Meester, Ben De; Verborgh, Ruben; Lehmann, Jens; Mannens, Erik; Hellmann, Sebastian

Sustainable Linked Data Generation: The Case of DBpedia Inproceedings

In: The Semantic Web - ISWC 2017 - 16th International Semantic Web Conference, Vienna, Austria, October 21-25, 2017, Proceedings, Part II, pp. 297–313, Springer, 2017.

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Meester, Ben De; Dimou, Anastasia; Maroy, Wouter; Kontokostas, Dimitris; Verborgh, Ruben; Lehmann, Jens; Mannens, Erik; Hellmann, Sebastian

A Vocabulary-Independent Generation Framework for DBpedia and Beyond Inproceedings

In: Proceedings of the ISWC 2017 Posters & Demonstrations and Industry Tracks co-located with 16th International Semantic Web Conference (ISWC 2017), Vienna, Austria, October 23rd - to - 25th, 2017, CEUR-WS.org, 2017.

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Trivedi, Priyansh; Maheshwari, Gaurav; Dubey, Mohnish; Lehmann, Jens

LC-QAD: A Corpus for Complex Question Answering over Knowledge Graphs Inproceedings

In: The Semantic Web - ISWC 2017 - 16th International Semantic Web Conference, Vienna, Austria, October 21-25, 2017, Proceedings, Part II, pp. 210–218, Springer, 2017.

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Lehmann, Jens; Auer, Sören; Capadisli, Sarven; Janowicz, Krzysztof; Bizer, Christian; Heath, Tom; Hogan, Aidan; Berners-Lee, Tim

LDOW2017: 10th Workshop on Linked Data on the Web Inproceedings

In: Proceedings of the 26th International Conference on World Wide Web Companion, Perth, Australia, April 3-7, 2017, pp. 1679–1680, ACM, 2017.

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Lukovnikov, Denis; Fischer, Asja; Lehmann, Jens; Auer, Sören

Neural Network-based Question Answering over Knowledge Graphs on Word and Character Level Inproceedings

In: Proceedings of the 26th International Conference on World Wide Web, WWW 2017, Perth, Australia, April 3-7, 2017, pp. 1211–1220, ACM, 2017.

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Höffner, Konrad; Walter, Sebastian; Marx, Edgard; Usbeck, Ricardo; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga

Survey on challenges of Question Answering in the Semantic Web Journal Article

In: Semantic Web, 8 (6), pp. 895–920, 2017.

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Marx, Edgard; Shekarpour, Saeedeh; Soru, Tommaso; Brasoveanu, Adrian M. P.; Saleem, Muhammad; Baron, Ciro; Weichselbraun, Albert; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga; Auer, Sören

Torpedo: Improving the State-of-the-Art RDF Dataset Slicing Inproceedings

In: 11th IEEE International Conference on Semantic Computing, ICSC 2017, San Diego, CA, USA, January 30 - February 1, 2017, pp. 149–156, IEEE Computer Society, 2017.

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Esteves, Diego; Moussallem, Diego; Soru, Tommaso; Neto, Ciro Baron; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga; Duarte, Julio Cesar

LOG4MEX: a library to export machine learning experiments Inproceedings

In: Proceedings of the International Conference on Web Intelligence, Leipzig, Germany, August 23-26, 2017, pp. 139–145, ACM, 2017.

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Usbeck, Ricardo; Hoffmann, Michael; Röder, Michael; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga

Using Multi-Label Classification for Improved Question Answering Journal Article

In: CoRR, abs/1710.08634 , 2017.

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2016

Sherif, Mohamed Ahmed

Automating Geospatial RDF Dataset Integration and Enrichment PhD Thesis

University of Leipzig, 2016.

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Bin, Simon; Bühmann, Lorenz; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga

Towards SPARQL-Based Induction for Large-Scale RDF Data Sets Inproceedings

In: ECAI 2016 - 22nd European Conference on Artificial Intelligence, 29 August-2 September 2016, The Hague, The Netherlands - Including Prestigious Applications of Artificial Intelligence (PAIS 2016), pp. 1551–1552, IOS Press, 2016.

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Rizzo, Giuseppe; Fanizzi, Nicola; Lehmann, Jens; Bühmann, Lorenz

Integrating New Refinement Operators in Terminological Decision Trees Learning Inproceedings

In: Knowledge Engineering and Knowledge Management - 20th International Conference, EKAW 2016, Bologna, Italy, November 19-23, 2016, Proceedings, pp. 511–526, 2016.

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ul Hassan, Umair; Zaveri, Amrapali; Marx, Edgard; Curry, Edward; Lehmann, Jens

ACRyLIQ: Leveraging DBpedia for Adaptive Crowdsourcing in Linked Data Quality Assessment Inproceedings

In: Knowledge Engineering and Knowledge Management - 20th International Conference, EKAW 2016, Bologna, Italy, November 19-23, 2016, Proceedings, pp. 681–696, 2016.

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Dubey, Mohnish; Dasgupta, Sourish; Sharma, Ankit; Höffner, Konrad; Lehmann, Jens

AskNow: A Framework for Natural Language Query Formalization in SPARQL Inproceedings

In: The Semantic Web. Latest Advances and New Domains - 13th International Conference, ESWC 2016, Heraklion, Crete, Greece, May 29 - June 2, 2016, Proceedings, pp. 300–316, Springer, 2016.

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Marx, Edgard; Zaveri, Amrapali; Mohammed, Mofeed; Rautenberg, Sandro; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga; Cheng, Gong

DBtrends: Publishing and Benchmarking RDF Ranking Functions Inproceedings

In: Proceedings of the 2nd International Workshop on Summarizing and Presenting Entities and Ontologies (SumPre 2016) co-located with the 13th Extended Semantic Web Conference (ESWC 2016), Anissaras, Greece, May 30, 2016, CEUR-WS.org, 2016.

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Esteves, Diego; Mendes, Pablo N.; Moussallem, Diego; Duarte, Julio Cesar; Zaveri, Amrapali; Lehmann, Jens

MEX Interfaces: Automating Machine Learning Metadata Generation Inproceedings

In: Proceedings of the 12th International Conference on Semantic Systems, SEMANTICS 2016, Leipzig, Germany, September 12-15, 2016, pp. 17–24, ACM, 2016.

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Marx, Edgard; Höffner, Konrad; Shekarpour, Saeedeh; Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens; Auer, Sören

Exploring Term Networks for Semantic Search over RDF Knowledge Graphs Inproceedings

In: Metadata and Semantics Research - 10th International Conference, MTSR 2016, Göttingen, Germany, November 22-25, 2016, Proceedings, pp. 249–261, 2016.

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

LODStats: The Data Web Census Dataset Inproceedings

In: The Semantic Web - ISWC 2016 - 15th International Semantic Web Conference, Kobe, Japan, October 17-21, 2016, Proceedings, Part II, pp. 38–46, 2016.

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Höffner, Konrad; Lehmann, Jens; Usbeck, Ricardo

CubeQA - Question Answering on RDF Data Cubes Inproceedings

In: The Semantic Web - ISWC 2016 - 15th International Semantic Web Conference, Kobe, Japan, October 17-21, 2016, Proceedings, Part I, pp. 325–340, 2016.

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Sherif, Mohamed Ahmed; Hassan, Mofeed M.; Soru, Tommaso; Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens

Lion's Den: feeding the LinkLion Inproceedings

In: Proceedings of the 11th International Workshop on Ontology Matching co-located with the 15th International Semantic Web Conference (ISWC 2016), Kobe, Japan, October 18, 2016, pp. 235–236, CEUR-WS.org, 2016.

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Höffner, Konrad; Martin, Michael; Lehmann, Jens

LinkeṢpending: OpenSpending becomes Linked Open Data Journal Article

In: Semantic Web, 7 (1), pp. 95–104, 2016.

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Zaveri, Amrapali; Rula, Anisa; Maurino, Andrea; Pietrobon, Ricardo; Lehmann, Jens; Auer, Sören

Quality assessment for Linked Data: A Survey Journal Article

In: Semantic Web, 7 (1), pp. 63–93, 2016.

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Bühmann, Lorenz; Lehmann, Jens; Westphal, Patrick

DL-Learner - A framework for inductive learning on the Semantic Web Journal Article

In: J. Web Semant., 39 , pp. 15–24, 2016.

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Kontokostas, Dimitris; Mader, Christian; Dirschl, Christian; Eck, Katja; Leuthold, Michael; Lehmann, Jens; Hellmann, Sebastian

Semantically Enhanced Quality Assurance in the JURION Business Use Case Inproceedings

In: The Semantic Web. Latest Advances and New Domains - 13th International Conference, ESWC 2016, Heraklion, Crete, Greece, May 29 - June 2, 2016, Proceedings, pp. 661–676, Springer, 2016.

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Dimou, Anastasia; Kontokostas, Dimitris; Freudenberg, Markus; Verborgh, Ruben; Lehmann, Jens; Mannens, Erik; Hellmann, Sebastian

DBpedia Mappings Quality Assessment Inproceedings

In: Proceedings of the ISWC 2016 Posters & Demonstrations Track co-located with 15th International Semantic Web Conference (ISWC 2016), Kobe, Japan, October 19, 2016, CEUR-WS.org, 2016.

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Thakkar, Harsh; Dubey, Mohnish; Sejdiu, Gezim; Ngomo, Axel-Cyrille Ngonga; Debattista, Jeremy; Lange, Christoph; Lehmann, Jens; Auer, Sören; Vidal, Maria-Esther

LITMUS: An Open Extensible Framework for Benchmarking RDF Data Management Solutions Journal Article

In: CoRR, abs/1608.02800 , 2016.

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Höffner, Konrad; Martin, Michael; Lehmann, Jens

LinkeSpending: OpenSpending becomes Linked Open Data Journal Article

In: Semantic Web, 7 (1), pp. 95–104, 2016.

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Höffner, Konrad; Martin, Michael; Lehmann, Jens

LinkeSpending: OpenSpending becomes Linked Open Đata Journal Article

In: Semantic Web, 7 (1), pp. 95–104, 2016.

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Höffner, Konrad; Martin, Michael; Lehmann, Jens

LinkedSpending: OpenSpending becomes Linked Open Data Journal Article

In: Semantic Web, 7 (1), pp. 95–104, 2016.

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2015

Speck, René; Esteves, Diego; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga

DeFacto - A Multilingual Fact Validation Interface Inproceedings

In: 14th International Semantic Web Conference (ISWC 2015), 11-15 October 2015, Bethlehem, Pennsylvania, USA (Semantic Web Challenge Proceedings), 2015, (Semantic Web Challenge, International Semantic Web Conference 2015).

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Lehmann, Jens; Athanasiou, Spiros; Both, Andreas; Buehmann, Lorenz; Garcia-Rojas, Alejandra; Giannopoulos, Giorgos; Hladky, Daniel; Hoeffner, Konrad; Grange, Jon Jay Le; Ngomo, Axel-Cyrille Ngonga; Pietzsch, Rene; Isele, Robert; Sherif, Mohamed Ahmed; Stadler, Claus; Wauer, Matthias; Westphal, Patrick

The GeoKnow Handbook Technical Report

2015.

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Proceedings of the 4th Knowledge Discovery and Data Mining Meets Linked Open Data (Know@LOD) Workshop in conjuction with the Extended Semantic Web Conference (ESWC) 2015. Proceeding

CEUR-WS.org, 1365 , 2015.

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Garcia-Rojas, Alejandra; Hladky, Daniel; Wauer, Matthias; Isele, Robert; Stadler, Claus; Lehmann, Jens

The GeoKnow Generator Workbench: An Integration Platform for Geospatial Data Inproceedings

In: Proceedings of the 3rd International Workshop on Semantic Web Enterprise Adoption and Best Practice, 2015.

BibTeX

Sherif, Mohamed Ahmed; Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens

Automating RDF Dataset Transformation and Enrichment Inproceedings

In: The Semantic Web. Latest Advances and New Domains - 12th European Semantic Web Conference, ESWC 2015, Portoroz, Slovenia, May 31 - June 4, 2015. Proceedings, pp. 371–387, Springer, 2015.

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Both, Andreas; Wauer, Matthias; Garc'ia-Rojas, Alejandra; Hladky, Daniel; Lehmann, Jens

The GeoKnow Generator Workbench - An Integrated Tool Supporting the Linked Data Lifecycle for Enterprise Usage Inproceedings

In: Joint Proceedings of the Posters and Demos Track of 11th International Conference on Semantic Systems - SEMANTiCS 2015 and 1st Workshop on Data Science: Methods, Technology and Applications (DSci15) 11th International Conference on Semantic Systems - SEMANTiCS 2015, Vienna, Austria, September 15-17, 2015, pp. 92–95, CEUR-WS.org, 2015.

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Ermilov, Ivan; Hoeffner, Konrad; Lehmann, Jens; Mouromtsev, Dmitry

kOre: Using Linked Data for OpenScience Information Integration Inproceedings

In: Joint Proceedings of the Posters and Demos Track of 11th International Conference on Semantic Systems - SEMANTiCS 2015 and 1st Workshop on Data Science: Methods, Technology and Applications (DSci15) 11th International Conference on Semantic Systems - SEMANTiCS 2015, Vienna, Austria, September 15-17, 2015, pp. 67–70, CEUR-WS.org, 2015.

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274 entries « 3 of 6 »