Semantic Technologies

RDF (data), OWL (ontology) and SPARQL (query) are the most popular semantic technologies used today

Semantic Technologies are comprise a wide field methods and technologies used to represent, manage, exchange, and process semantic data. At the heart of this are machine-readable formats for representing data and schema information (ontologies). A number of related technology standards have been created by the World Wide Web Consortium (W3C) in the context of its Semantic Web and Web of Data activities. The most prominent of these standards are the RDF Resource Description Language (a graph-based data-representation format), the OWL Web Ontology Language (an ontology language based on Description Logics), and the SPARQL Protocol and RDF Query Language (a data management and query language). However, semantic technologies also comprise other approaches, such as the annotation approach of schema.org, as well as aspects of methodology and infrastructure.
Research in semantic technologies is concerned with a variety of applied questions. The specification and processing of ontologies is closely related to the field of knowledge representation and reasoning while other questions touch upon issues of databases, information extraction, or Web systems. The latter aspect comes to the fore in applications of Linked Open Data, but there are also many important uses of OWL and RDF that have little or nothing to do with the World Wide Web.

Former Student Assistant
Knowledge-Based Systems

M.Sc. Irina Dragoste

Former Research Associate
Knowledge-Based Systems

Fredo Erxleben

Former Student Assistant
Knowledge-Based Systems

Julius Gonsior

Former Student Assistant
Knowledge-Based Systems

Ass.-Prof. Dagmar Gromann

Former Research Associate
Computational Logic

Michael Günther

Former Graduate Assistant
Knowledge-Based Systems

M.Sc. Lukas Schweizer

Former Research Associate
Computational Logic

M.Sc. Satyadharma Tirtarasa

Former Research Associate
Automata Theory

Georg Wild

Former Student Assistant
Knowledge-Based Systems

Journal Articles

Philipp Hanisch, Markus Krötzsch
Chase Termination Beyond Polynomial Time
Proc. ACM Manag. Data, 2(2):93, May 2024
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Shima Asaadi, Eugenie Giesbrecht, Sebastian Rudolph
Compositional matrix-space models of language: Definitions, properties, and learning methods
Natural Language Engineering, 29(1):1-49, January 2023
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Markus Krötzsch
Wissen als Code: Die Welt der Wissensgraphen und Ontologien
Linux-Magazin (12/2022):24-28, 2022
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Xiaoyu Yin, Dagmar Gromann, Sebastian Rudolph
Neural Machine Translating from Natural Language to SPARQL
Future Generation Computer Systems, 117:510-519, 2021
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Fariz Darari, Sebastian Rudolph, Simon Razniewski, Werner Nutt
Completeness and soundness guarantees for conjunctive SPARQL queries over RDF data sources with completeness statements
Semantic Web, 11(3):441-482, 2020
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Aparna Saisree Thuluva, Darko Anicic, Sebastian Rudolph, Malintha Adikari
Semantic Node-RED for rapid development of interoperable industrial IoT applications
Semantic Web, 11(6):949-975, October 2020
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Long Cheng, Spyros Kotoulas
Efficient Skew Handling for Outer Joins in a Cloud Computing Environment
IEEE Transactions on Cloud Computing, 6(2):558 - 571, 2018
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Ignacio Lamata Martínez, Martin S Williams, Shirley Dyke, Markus Krötzsch, Pierre Pegon
Next directions in experimental data for seismic hazard mitigation
Engineering Structures, 136:535-546, 2017
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Long Cheng, Avinash Malik, Spyros Kotoulas, Tomas E. Ward, Georgios Theodoropoulos
Fast Compression of Large Semantic Web Data using X10
IEEE Transactions on Parallel and Distributed Systems, 27(9):2603-2617, September 2016
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Markus Krötzsch, Sebastian Rudolph
Is Your Database System a Semantic Web Reasoner?
KI, 30(2):169-176, 2016
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Long Cheng, Spyros Kotoulas
Scale-Out Processing of Large RDF Datasets
IEEE Transactions on Big Data, 1(4):138-150, December 2015
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Markus Krötzsch, František Simančík, Ian Horrocks
Description Logics
IEEE Intelligent Systems, 29(1):12-19, 2014
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Despoina Magka, Markus Krötzsch, Ian Horrocks
A rule-based ontological framework for the classification of molecules
J. Biomedical Semantics, 5:17, 2014
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Nadeschda Nikitina, Sebastian Rudolph
(Non-)Succinctness of uniform interpolants of general terminologies in the description logic ℰℒ
Artificial Intelligence, 215:120-140, October 2014
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Giorgo Stefanoni, Boris Motik, Markus Krötzsch, Sebastian Rudolph
The Complexity of Answering Conjunctive and Navigational Queries over OWL 2 EL Knowledge Bases
Journal of Artificial Intelligence Research, 51:645-705, December 2014
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Denny Vrandečić, Markus Krötzsch
Wikidata: a free collaborative knowledgebase
Commun. ACM, 57(10):78-85, 2014
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Bernardo Cuenca Grau, Ian Horrocks, Markus Krötzsch, Clemens Kupke, Despoina Magka, Boris Motik, Zhe Wang
Acyclicity Notions for Existential Rules and Their Application to Query Answering in Ontologies
J. Artif. Intell. Res. (JAIR), 47:741-808, 2013
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Thanh Tran, Günter Ladwig, Sebastian Rudolph
Managing Structured and Semistructured RDF Data Using Structure Indexes
IEEE Transactions on Knowledge and Data Engineering, 25(9):2076-2089, 2013
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Emanuele Della Valle, Stefan Schlobach, Markus Krötzsch, Alessandro Bozzon, Stefano Ceri, Ian Horrocks
Order matters! Harnessing a world of orderings for reasoning over massive data
Semantic Web, 4(2):219-231, 2013
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Darko Anicic, Sebastian Rudolph, Paul Fodor, Nenad Stojanovic
Real-Time Complex Event Recognition and Reasoning-a Logic Programming Approach
Applied Artificial Intelligence, 26(1-2):6-57, February 2012
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Darko Anicic, Sebastian Rudolph, Paul Fodor, Nenad Stojanovic
Stream reasoning and complex event processing in ETALIS
Semantic Web, 3(4):397-407, 2012
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Nadeschda Nikitina, Sebastian Rudolph, Birte Glimm
Interactive ontology revision
Journal of Web Semantics, 12:118-130, April 2012
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Denny Vrandečić, Varun Ratnakar, Markus Krötzsch, Yolanda Gil
Shortipedia: Aggregating and Curating Semantic Web Data
J. Web Sem., 9(3):334-338, 2011
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Sebastian Rudolph, Birte Glimm
Nominals, Inverses, Counting, and Conjunctive Queries or: Why Infinity is Your Friend!
Journal of Artificial Intelligence Research, 39:429-481, October 2010
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Denny Vrandečić, Markus Krötzsch, Sebastian Rudolph, Uta Lösch
Leveraging Non-Lexical Knowledge for the Linked Open Data Web
The Fifth RAFT'2010 The yearly bilingual publication on nonchalant research, 5(1):18-27, April 2010
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Anupriya Ankolekar, Markus Krötzsch, Duc Thanh Tran, Denny Vrandečić
The two cultures: mashing up Web 2.0 and the Semantic Web
Journal of Web Semantics, 6(1), February 2008
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Markus Krötzsch, Denny Vrandečić, Max Völkel, Heiko Haller, Rudi Studer
Semantic Wikipedia
Journal of Web Semantics, 5:251--261, September 2007
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Proceedings Articles

Alex Ivliev, Lukas Gerlach, Simon Meusel, Jakob Steinberg, Markus Krötzsch
Nemo: Your Friendly and Versatile Rule Reasoning Toolkit
Proceedings of the 21st International Conference on Principles of Knowledge Representation and Reasoning (KR 2024), Proceedings of the International Conference on Principles of Knowledge Representation and Reasoning, to appear. IJCAI Organization
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Lucía Gómez Álvarez, Sebastian Rudolph, Hannes Straß
Tractable Diversity: Scalable Multiperspective Ontology Management via Standpoint EL
Proceedings of the 32nd International Joint Conference on Artificial Intelligence, IJCAI 2023, 3258-3267, 2023. ijcai.org
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Lucía Gómez Álvarez, Sebastian Rudolph, Hannes Straß
Pushing the Boundaries of Tractable Multiperspective Reasoning: A Deduction Calculus for Standpoint EL+
In Pierre Marquis, Tran Cao Son, Gabriele Kern-Isberner, eds., Proceedings of the 20th International Conference on Principles of Knowledge Representation and Reasoning, 333-343, 2023. IJCAI Inc
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Alex Ivliev, Stefan Ellmauthaler, Lukas Gerlach, Maximilian Marx, Matthias Meißner, Simon Meusel, Markus Krötzsch
Nemo: First Glimpse of a New Rule Engine
In Enrico Pontelli, Stefania Costantini, Carmine Dodaro, Sarah Gaggl, Roberta Calegari, Artur D'Avila Garcez, Francesco Fabiano, Alessandra Mileo, Alessandra Russo, Francesca Toni, eds., Proceedings 39th International Conference on Logic Programming (ICLP 2023), volume 385 of EPTCS, 333--335, September 2023
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Denny Vrandečić, Lydia Pintscher, Markus Krötzsch
Wikidata: The Making Of
In Ying Ding, Jie Tang, Juan F. Sequeda, Lora Aroyo,Carlos Castillo, Geert-Jan Houben, eds., Companion Proceedings of the ACM Web Conference 2023 (WWW'23), 615--624, 2023. ACM
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Larry González, Alex Ivliev, Markus Krötzsch, Stephan Mennicke
Efficient Dependency Analysis for Rule-Based Ontologies
In Ulrike Sattler, Aidan Hogan, Maria Keet, Valentina Presutti, João Paulo A. Almeida, Hideaki Takeda, Pierre Monnin, Giuseppe Pirrò, Claudia d’Amato, eds., Proc. 21st International Semantic Web Conference (ISWC 2022), volume 13489 of LNCS, 267-283, October 2022. Springer
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Shima Asaadi, Saif M. Mohammad, Svetlana Kiritchenko
Big BiRD: A Large, Fine-Grained, Bigram Relatedness Dataset for Examining Semantic Composition
Proceedings of the Annual Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies (NAACL), June 2019
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David Carral, Irina Dragoste, Markus Krötzsch, Christian Lewe
Chasing Sets: How to Use Existential Rules for Expressive Reasoning
Proceedings of the 28th International Joint Conference on Artificial Intelligence (IJCAI'19), August 2019. International Joint Conferences on Artificial Intelligence
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David Carral, Irina Dragoste, Larry González, Ceriel Jacobs, Markus Krötzsch, Jacopo Urbani
VLog: A Rule Engine for Knowledge Graphs
In Chiara Ghidini, Olaf Hartig, Maria Maleshkova, Vojtěch Svátek, Isabel F. Cruz, Aidan Hogan, Jie Song, Maxime Lefrançois, Fabien Gandon, eds., Proceedings of the 18th International Semantic Web Conference (ISWC'19) Part II, volume 11779 of LNCS, 2019. Springer
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Markus Krötzsch
Too Much Information: Can AI Cope With Modern Knowledge Graphs?
In Diana Cristea, Florence Le Ber, Baris Sertkaya, eds., Proceedings of the 15th International Conference on Formal Concept Analysis (ICFCA 2019), volume 11511 of LNCS, 17--31, 2019. Springer
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Sebastian Rudolph, Lukas Schweizer, Zhihao Yao
SPARQL Queries over Ontologies Under the Fixed-Domain Semantics
In Abhaya C. Nayak, Alok Sharma, eds., PRICAI 2019: Trends in Artificial Intelligence - 16th Pacific Rim International Conference on Artificial Intelligence, Cuvu, Yanuca Island, Fiji, August 26-30, 2019, Proceedings, Part I, volume 11670 of Lecture Notes in Computer Science, 486--499, August 2019. Springer
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Adrian Bielefeldt, Julius Gonsior, Markus Krötzsch
Practical Linked Data Access via SPARQL: The Case of Wikidata
In Tim Berners-Lee, Sarven Capadisli, Stefan Dietze, Aidan Hogan, Krzysztof Janowicz, Jens Lehmann, eds., Proceedings of the WWW2018 Workshop on Linked Data on the Web (LDOW-18), volume 2073 of CEUR Workshop Proceedings, 2018. CEUR-WS.org
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David Carral, Irina Dragoste, Markus Krötzsch
The Combined Approach to Query Answering in Horn-ALCHOIQ
In Michael Thielscher, Francesca Toni, Frank Wolter, eds., Proceedings of the 16th International Conference on Principles of Knowledge Representation and Reasoning (KR 2018), 339-348, October 2018. AAAI Press
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Larry González, Aidan Hogan
Modelling Dynamics in Semantic Web Knowledge Graphs with Formal Concept Analysis
Proceedings of the 2018 World Wide Web Conference on World Wide Web, WWW 2018, Lyon, France, April 23-27, 2018. ACM 2018, April 2018
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Markus Krötzsch, Maximilian Marx, Ana Ozaki, Veronika Thost
Attributed Description Logics: Reasoning on Knowledge Graphs
In Jérôme Lang, eds., Proceedings of the 27th International Joint Conference on Artificial Intelligence (IJCAI'18), 5309--5313, July 2018. International Joint Conferences on Artificial Intelligence
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Stanislav Malyshev, Markus Krötzsch, Larry González, Julius Gonsior, Adrian Bielefeldt
Getting the Most out of Wikidata: Semantic Technology Usage in Wikipedia’s Knowledge Graph
In Denny Vrandečić, Kalina Bontcheva, Mari Carmen Suárez-Figueroa, Valentina Presutti, Irene Celino, Marta Sabou, Lucie-Aimée Kaffee, Elena Simperl, eds., Proceedings of the 17th International Semantic Web Conference (ISWC'18), volume 11137 of LNCS, 376-394, 2018. Springer
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Ana Ozaki, Markus Krötzsch, Sebastian Rudolph
Happy Ever After: Temporally Attributed Description Logics
In Magdalena Ortiz, Thomas Schneider, eds., Proceedings of the 31st International Workshop on Description Logics (DL 2018), volume 2211 of CEUR Workshop Proceedings, 2018. CEUR-WS.org
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Jacopo Urbani, Markus Krötzsch, Ceriel Jacobs, Irina Dragoste, David Carral
Efficient Model Construction for Horn Logic with VLog
In Didier Galmiche, Stephan Schulz, Roberto Sebastiani, eds., Proceedings of the 8th International Joint Conference on Automated Reasoning (IJCAR 2018), volume 10900 of LNCS, 680--688, 2018. Springer
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Shima Asaadi, Sebastian Rudolph
Gradual Learning of Matrix-Space Models of Language for Sentiment Analysis
In Phil Blunsom, Antoine Bordes, Kyunghyun Cho, Shay B. Cohen, Chris Dyer, Edward Grefenstette, Karl Moritz Hermann, Laura Rimell, Jason Weston, Scott Yih, eds., Proceedings of the 2nd Workshop on Representation Learning for NLP, ACL2017, 178-185, August 2017. Association for Computational Linguistics
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David Carral, Irina Dragoste, Markus Krötzsch
Tractable Query Answering for Expressive Ontologies and Existential Rules
In Claudia d'Amato, Miriam Fernández, Valentina A. M. Tamma, Freddy Lécué, Philippe Cudré-Mauroux, Juan F. Sequeda, Christoph Lange, Jeff Heflin, eds., Proceedings of the 16th International Semantic Web Conference (ISWC'17), volume 10587 of LNCS, 2017. Springer
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David Carral, Irina Dragoste, Markus Krötzsch
Restricted chase (non)termination for existential rules with disjunctions
In Carles Sierra, eds., Proceedings of the 26th International Joint Conference on Artificial Intelligence (IJCAI'17), 922-928, 2017. International Joint Conferences on Artificial Intelligence
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David Carral, Irina Dragoste, Markus Krötzsch
Answering Conjunctive Queries for Expressive DLs with the Restricted Chase: Extended Abstract
In Alessandro Artale, Birte Glimm, Roman Kontchakov, eds., Proceedings of the 30st International Workshop on Description Logics (DL 2017), volume 1879 of CEUR Workshop Proceedings, July 2017. CEUR-WS.org
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Markus Krötzsch
Ontologies for Knowledge Graphs?
In Alessandro Artale, Birte Glimm, Roman Kontchakov, eds., Proceedings of the 30th International Workshop on Description Logics (DL 2017), volume 1879 of CEUR Workshop Proceedings, July 2017. CEUR-WS.org
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Markus Krötzsch, Maximilian Marx, Ana Ozaki, Veronika Thost
Attributed Description Logics: Ontologies for Knowledge Graphs
In Claudia d'Amato, Miriam Fernández, Valentina A. M. Tamma, Freddy Lécué, Philippe Cudré-Mauroux, Juan F. Sequeda, Christoph Lange, Jeff Heflin, eds., Proceedings of the 16th International Semantic Web Conference (ISWC'17), volume 10587 of LNCS, 418--435, October 2017. Springer
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Maximilian Marx, Markus Krötzsch, Veronika Thost
Logic on MARS: Ontologies for generalised property graphs
In Carles Sierra, eds., Proceedings of the 26th International Joint Conference on Artificial Intelligence (IJCAI'17), 1188-1194, August 2017. International Joint Conferences on Artificial Intelligence
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Sebastian Rudolph, Lukas Schweizer, Satyadharma Tirtarasa
Wolpertinger: A Fixed-Domain Reasoner
In Nadeschda Nikitina, Dezhao Song, eds., ISWC 2017 Posters & Demonstration Track, October 2017
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Shima Asaadi, Sebastian Rudolph
On the Correspondence between Compositional Matrix-Space Models of Language and Weighted Automata
Proceedings of the ACL Workshop on Statistical Natural Language Processing and Weighted Automata (StatFSM 2016), August 2016
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David Carral, Cristina Feier, Pascal Hitzler
A Practical Acyclicity Notion for Query Answering Over Horn-SRIQ Ontologies
In Paul Groth, Elena Simperl, Alasdair Gray, Marta Sabou, Markus Krötzsch, Freddy Lecue, Fabian Flock, Yolanda Gil, eds., The Semantic Web - ISWC 2016 - 15th International Semantic Web Conference, Kobe, Japan. Proceedings, Part I, volume 9981 of LNCS, 70-85, October 2016. Springer
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Stathis Delivorias, Sebastian Rudolph
Revisiting Grounded Circumscription in Description Logics
In Magdalena Ortiz, Stefan Schlobach, eds., Proceedings of the 10th International Conference on Web Reasoning and Rule Systems, volume 9898 of LNCS, 46-60, September 2016. Springer
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Markus Krötzsch, Veronika Thost
Ontologies for Knowledge Graphs: Breaking the Rules
In Yolanda Gil, Elena Simperl, Paul Groth, Freddy Lecue, Markus Krötzsch, Alasdair Gray, Marta Sabou, Fabian Flöck, Hideaki Takeda, eds., Proceedings of the 15th International Semantic Web Conference (ISWC 2016), volume 9981 of LNCS, 376-392, 2016. Springer
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Jacopo Urbani, Ceriel Jacobs, Markus Krötzsch
VLog: A Column-Oriented Datalog System for Large Knowledge Graphs
In Takahiro Kawamura, Heiko Paulheim, eds., Proceedings of the 15th International Semantic Web Conf. (ISWC'16), Posters and Demos, volume 1690 of CEUR Workshop Proceedings, 2016. CEUR-WS.org
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Jacopo Urbani, Ceriel Jacobs, Markus Krötzsch
Column-Oriented Datalog Materialization for Large Knowledge Graphs
In Dale Schuurmans, Michael P. Wellman, eds., Proceedings of the 30th AAAI Conference on Artificial Intelligence, 258-264, 2016. AAAI Press
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Stefan Bischof, Markus Krötzsch, Axel Polleres, Sebastian Rudolph
Schema-Agnostic Query Rewriting for OWL QL
In Diego Calvanese, Boris Konev, eds., Proceedings of the 28th International Workshop on Description Logics, volume 1350 of CEUR Workshop Proceedings, 2015. CEUR-WS.org
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Sarah Alice Gaggl, Sebastian Rudolph, Lukas Schweizer
Bound Your Models! How to Make OWL an ASP Modeling Language
In Stefan Ellmauthaler, Claudia Schulz, eds., International Workshop on User-Oriented Logic Programming (IULP), November 2015
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Daniel Hernández, Aidan Hogan, Markus Krötzsch
Reifying RDF: What Works Well With Wikidata?
In Thorsten Liebig and Achille Fokoue, eds., Proceedings of the 11th International Workshop on Scalable Semantic Web Knowledge Base Systems, volume 1457 of CEUR Workshop Proceedings, 32-47, 2015. CEUR-WS.org
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Stefan Bischof, Markus Krötzsch, Axel Polleres, Sebastian Rudolph
Schema-Agnostic Query Rewriting in SPARQL 1.1
In Peter Mika, Tania Tudorache, Abraham Bernstein, Chris Welty, Craig A. Knoblock, Denny Vrandečić, Paul T. Groth, Natasha F. Noy, Krzysztof Janowicz, Carole A. Goble, eds., Proc. 13th International Semantic Web Conference (ISWC'14), volume 8796 of LNCS, 584-600, October 2014. Springer
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Fredo Erxleben, Michael Günther, Markus Krötzsch, Julian Mendez, Denny Vrandečić
Introducing Wikidata to the Linked Data Web
In Peter Mika, Tania Tudorache, Abraham Bernstein, Chris Welty, Craig A. Knoblock, Denny Vrandečić, Paul T. Groth, Natasha F. Noy, Krzysztof Janowicz, Carole A. Goble, eds., Proceedings of the 13th International Semantic Web Conference (ISWC 2014), volume 8796 of LNCS, 50-65, October 2014. Springer
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Markus Krötzsch, Sebastian Rudolph
Nominal Schemas in Description Logics: Complexities Clarified
In Chitta Baral, Giuseppe De Giacomo, Thomas Eiter, eds., Proc. 14th International Conference on Principles of Knowledge Representation and Reasoning (KR'14), 308-317, July 2014. AAAI Press
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Sebastian Rudolph
The Two Views on Ontological Query Answering
In Georg Gottlob, Jorge Pérez, eds., Proceedings of the 8th Alberto Mendelzon Workshop on Foundations of Data Management, volume 1189 of CEUR Workshop Proceedings, June 2014. CEUR
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Birte Glimm, Aidan Hogan, Markus Krötzsch, Axel Polleres
OWL: Yet to arrive on the Web of Data?
Proceedings of the WWW2012 Workshop on Linked Data on the Web (LDOW-12), volume 937 of CEUR Workshop Proceedings, 2012. CEUR-WS.org
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Bernardo Cuenca Grau, Ian Horrocks, Markus Krötzsch, Clemens Kupke, Despoina Magka, Boris Motik, Zhe Wang
Acyclicity Conditions and their Application to Query Answering in Description Logics
Proc. 13th International Conference on Principles of Knowledge Representation and Reasoning (KR'12), 243–253, June 2012. AAAI Press
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Markus Krötzsch
OWL 2 Profiles: An Introduction to Lightweight Ontology Languages
Reasoning Web Summer School 2012, 112-183, September 2012. Springer
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Markus Krötzsch
The Not-So-Easy Task of Computing Class Subsumptions in OWL RL
Proc. 11th International Semantic Web Conference (ISWC'11), 279-294, 2012. Springer
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Markus Krötzsch, Sebastian Speiser
ShareAlike Your Data: Self-referential Usage Policies for the Semantic Web
Proc. 10th International Semantic Web Conference (ISWC'11), 354-369, October 2011. Springer
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Markus Krötzsch, Frederick Maier, Adila Krisnadhi, Pascal Hitzler
A Better Uncle for OWL: Nominal Schemas for Integrating Rules and Ontologies
Proc. 20th International Conference on World Wide Web (WWW'11), 645-654, March 2011. ACM
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Birte Glimm, Markus Krötzsch
SPARQL Beyond Subgraph Matching
In Peter F. Patel-Schneider, Yue Pan, Birte Glimm, Pascal Hitzler, Peter Mika, Jeff Pan, Ian Horrocks, eds., Proceedings of the 9th International Semantic Web Conference (ISWC 2010), volume 6496 of LNCS, 241-256, 2010. Springer
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Anupriya Ankolekar, Markus Krötzsch, Duc Thanh Tran, Denny Vrandečić
The Two Cultures: Mashing up Web 2.0 and the Semantic Web
Proceedings of the 16th International Conference on the World Wide Web (WWW'07), May 2007
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Anupriya Ankolekar, Philipp Cimiano, Pascal Hitzler, Markus Krötzsch, Günter Ladwig, Holger Lewen, Daniel Oberle, Rudi Studer, Malte Kiesel, Michael Sintek
SmartWeb: Mobile Access to the Semantic Web
In Holger Wache, eds., Proceedings of the ESWC2006 poster and demo session, 3-4, June 2006
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Anupriya Ankolekar, Paul Buitelaar, Philipp Cimiano, Pascal Hitzler, Malte Kiesel, Markus Krötzsch, Holger Lewen, G. Neumann, Michael Sintek, Tuvshintur Tserendorj, Rudi Studer
SmartWeb: Mobile Access to the Semantic Web
Proceedings of the ISWC 2006 Poster and Demo Session, November 2006
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Markus Krötzsch, Pascal Hitzler, Denny Vrandečić, Michael Sintek
How to reason with OWL in a logic programming system
In Thomas Eiter, Enrico Franconi, Ralph Hodgson, Susie Stephens, eds., Proceedings of the Second International Conference on Rules and Rule Markup Languages for the Semantic Web, RuleML2006, 17--26, November 2006. IEEE Computer Society
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Markus Krötzsch, Denny Vrandečić, Max Völkel
Semantic MediaWiki
In Isabel Cruz and Stefan Decker and Dean Allemang and Chris Preist and Daniel Schwabe and Peter Mika and Mike Uschold and Lora Aroyo, eds., Proceedings of the 5th International Semantic Web Conference (ISWC06), volume 4273 of Lecture Notes in Computer Science, 935-942, November 2006. Springer
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Max Völkel, Markus Krötzsch, Denny Vrandečić, Heiko Haller, Rudi Studer
Semantic Wikipedia
Proceedings of the 15th international conference on World Wide Web (WWW 2006), May 2006
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Pascal Hitzler, Peter Haase, Markus Krötzsch, York Sure, Rudi Studer
DLP isn't so bad after all
In Bernardo Cuenca Grau, Ian Horrocks, Bijan Parsia, Peter Patel-Schneider, eds., Proceedings of the Workshop OWL - Experiences and Directions, Galway, Ireland, volume 188 of CEUR Workshop Proceedings, November 2005
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Pascal Hitzler, Markus Krötzsch, Marc Ehrig, York Sure
What Is Ontology Merging? – A Category-Theoretical Perspective Using Pushouts
In Pavel Shvaiko, Jerome Euzenat, Alain Leger, Deborah L. McGuinness, Holger Wache, eds., Proceedings of the First International Workshop on Contexts and Ontologies: Theory, Practice and Applications (C&0). Workshop at the 20th National Conference on Artificial Intelligence, AAAI-05, Pittsburgh, Pennsylvania, July 2005, Technical Report WS-05-01, 104-107, July 2005. AAAI Press, Menlo Park, California
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Markus Krötzsch, Denny Vrandečić, Max Völkel
Wikipedia and the Semantic Web - The Missing Links
Proceedings of Wikimania 2005 - The First International Wikimedia Conference, July 2005. Wikimedia Foundation
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Books

Pascal Hitzler, Markus Krötzsch, Sebastian Rudolph
语义Web技术基础
世界著名计算机教材精选. Tsinghua University Press, 2012
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Pascal Hitzler, Markus Krötzsch, Sebastian Rudolph
Foundations of Semantic Web Technologies
Chapman & Hall/CRC, August 2009
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Pascal Hitzler, Markus Krötzsch, Sebastian Rudolph, York Sure
Semantic Web - Grundlagen
eXamen.press. Springer-Verlag Berlin Heidelberg, January 2008
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Book Chapters

Ana Ozaki, Markus Krötzsch, Sebastian Rudolph
Temporally Attributed Description Logics
In Carsten Lutz, Uli Sattler, Cesare Tinelli, Anni-Yasmin Turhan, Frank Wolter, eds., Description Logic, Theory Combination, and All That - Essays Dedicated to Franz Baader on the Occasion of His 60th Birthday, volume 11560 of LNCS, 441-474. Springer, 2019
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Anupriya Ankolekar, Markus Krötzsch, Duc Thanh Tran, Denny Vrandečić
Die zwei Kulturen
In Andreas Blumauer and Tassilo Pellegrini, eds., Social Semantic Web, X.media.press, 99-123. Springer, October 2008
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Markus Krötzsch, Denny Vrandečić
Semantic Wikipedia
In Andreas Blumauer and Tassilo Pellegrini, eds., Social Semantic Web, X.media.press, 393-422. Springer, October 2008
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Denny Vrandečić, Markus Krötzsch, Max Völkel
Die Zukunft der Wikis: Semantic Web
In Christoph Lange, eds., Wikis und Blogs: Planen, Einrichten, Verwalten, 789-810. C&L Computer und Literaturverlag, January 2007
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Edited Proceedings

Markus Krötzsch, Daria Stepanova
Explainable Artificial Intelligence. Proceedings of the 15th Reasoning Web Summer School
Volume 11810 of LNCS, 2019. Springer
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Daniele Dell'Aglio, Emanuele Della Valle, Thomas Eiter, Markus Krötzsch, Maria Maleshkova, Ruben Verborgh, Federico M. Facca, Michael Mrissa
Joint Proceedings of the 3rd Stream Reasoning (SR 2016) and the 1st Semantic Web Technologies for the Internet of Things (SWIT 2016) workshops
Volume 1783 of CEUR Workshop Proceedings, 2017. CEUR-WS.org
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Paul T. Groth, Elena Simperl, Alasdair J. G. Gray, Marta Sabou, Markus Krötzsch, Freddy Lécué, Fabian Flöck, Yolanda Gil
Proceedings of the 15th International Semantic Web Conference (ISWC 2016), Part I
Volume 9981 of LNCS, 2016. Springer
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Paul T. Groth, Elena Simperl, Alasdair J. G. Gray, Marta Sabou, Markus Krötzsch, Freddy Lécué, Fabian Flöck, Yolanda Gil
Proceedings of the 15th International Semantic Web Conference (ISWC 2016), Part II
Volume 9982 of LNCS, 2016. Springer
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Kostis Kyzirakos, Cory A. Henson, Matthew Perry, Dalia Varanka, Rolf Grütter, Jean-Paul Calbimonte, Irene Celino, Emanuele Della Valle, Daniele Dell'Aglio, Markus Krötzsch, Stefan Schlobach
Joint Proceedings of the 1st Joint International Workshop on Semantic Sensor Networks and Terra Cognita (SSN-TC 2015) and the 4th International Workshop on Ordering and Reasoning (OrdRing 2015)
Volume 1488 of CEUR Workshop Proceedings, 2015. CEUR-WS.org
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Irene Celino, Emanuele Della Valle, Markus Krötzsch, Stefan Schlobach
Proceedings of the 2nd International Workshop on Ordering and Reasoning, OrdRing 2013
Volume 1059 of CEUR Workshop Proceedings, 2013. CEUR-WS.org
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Philipp Cimiano, Óscar Corcho, Valentina Presutti, Laura Hollink, Sebastian Rudolph
The Semantic Web: Semantics and Big Data, 10th International Conference, ESWC 2013, Montpellier, France, May 26-30, 2013. Proceedings
Volume 7882 of Lecture Notes in Computer Science, 2013. Springer
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Sebastian Rudolph, Georg Gottlob, Ian Horrocks, Frank van Harmelen
Reasoning Web. Semantic Technologies for Intelligent Data Access - 9th International Summer School 2013, Mannheim, Germany, July 30 - August 2, 2013. Proceedings
Volume 8067 of Lecture Notes in Computer Science, 2013. Springer
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Markus Krötzsch, Umberto Straccia
Web Reasoning and Rule Systems - 6th International Conference, RR 2012, Vienna, Austria, September 10-12, 2012. Proceeding
Volume 7497 of Lecture Notes in Computer Science, 2012. Springer
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Sebastian Rudolph, Claudio Gutierrez
Web Reasoning and Rule Systems - 5th International Conference (RR 2011)
Volume 6902 of LNCS, August 2011. Springer
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Technical Reports

Markus Krötzsch, Sebastian Speiser
Expressing Self-Referential Usage Policies for the Semantic Web
Technical Report, Institut AIFB, KIT, June 2011
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Markus Krötzsch
Efficient Inferencing for the Description Logic Underlying OWL EL
Technical Report, Institut AIFB, KIT, May 2010
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Markus Krötzsch, Pascal Hitzler, Marc Ehrig, York Sure
Category Theory in Ontology Research: Concrete Gain from an Abstract Approach
Technical Report, AIFB, Universität Karlsruhe, volume 893, March 2005
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Project Deliverables

Philipp Cimiano, Duc Thanh Tran, Pascal Hitzler, Markus Krötzsch, A. Lavelli, Bernhard Schuler, Giorgos Stoilos, Karen Tso, Vassilis Tzouvaras
Incorporating Uncertainty into RDF and OWL. X-Media Deliverable D2.1
Institute AIFB, University of Karlsruhe, November 2006
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Pascal Hitzler, Jerome Euzenat, Markus Krötzsch, Luciano Serafini, Heiner Stuckenschmidt, Holger Wache, Antoine Zimmermann
Integrated view and comparison of alignment semantics
AIFB, University of Karlsruhe, (D2.2.5), January 2006
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Talks and Miscellaneous

Markus Krötzsch
Data, Ontologies, Rules, and the Return of the Blank Node
Keynote at the 21st International Semantic Web Conference, 2022
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Tom Hanika, Maximilian Marx, Gerd Stumme
Interactively Discovering Implicational Knowledge in Wikidata
Presentation at 36th Chaos Communication Congress 2019, December 2019
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Tom Hanika, Maximilian Marx, Gerd Stumme
Discovering Implicational Knowledge in Wikidata
Presentation at Wikimania 2019, August 2019
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Tom Hanika, Maximilian Marx, Gerd Stumme
The Exploration Game
Poster at Wikimania 2019, August 2019
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Markus Krötzsch
Working with Knowledge Graphs
Course at EDBT Summer School 2019, Lyon, France, 2019
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Markus Krötzsch
Recent Advances in Reasoning with Existential Rules
Presentation at the 2018 Workshop of the European Master in Computational Logic (EMCL), 2018
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Markus Krötzsch
Getting the most out of Wikidata
Invited presentation at Wiki Workshop 2018, 2018
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Markus Krötzsch
Ontological Modelling in Wikidata
Invited keynote at the 9th Workshop on Ontology Design and Patterns (WOP'18), 2018
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Maximilian Marx, Markus Krötzsch
The New SQID: Improving Wikidata Made Easy
Presentation at WikidataCon 2017, 2017
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Markus Krötzsch
Wikidata as a Cultural Heritage Information Hub
Invited talk at the Europeana Network Association AGM 2016, November 2016
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Markus Krötzsch
Practical Reasoning with OWL and Rules
Invited talk at the Semantic Web Technology Showcase 2007, Vienna, Austria, May 2007
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Max Völkel, Heiko Haller, Markus Krötzsch, Denny Vrandečić
Die neuen Tools: Web 2.0, Semantic Wiki, Social Tagging & Co.
Slides available online, March 2006
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