HAEC B08

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HAEC B08

High-Capacity Knowledge Processing Pipeline (HAEC Project B08)

HAEC takes a comprehensive approach to energy efficiency, where individual components of hardware and software are not studied in isolation but in a greater context that allows the system to make optimal decisions at any point in time. To achieve this – and indeed even to evaluate whether it has been achieved yet – it is essential to confront the system with practically relevant computational workloads that can challenge the novel, adaptive architecture of HAEC on all levels.

To address this task, project HAEC B08 plans to create a new bridge between high-level knowledge-driven applications and low-level data management infrastructure in HAEC. This should enable applications to express complex information needs in a concise, efficient, and declarative way while exploiting the specific hardware and software characteristics of the HAEC Box. We believe that navigational query languages are the appropriate tool for this: they can capture advanced computations, such as graph search operations, yet they have a fully declarative semantics that is a sound basis for data exchange across application boundaries. Given this “middle ground,” we obtain two clearly defined main targets: (1) high-level applications must exploit the power of navigational queries to reduce communication, and (2) low-level components must answer such queries efficiently on the given computational architecture. Neither of these would make sense in isolation, since the gap can only be closed if both sides agree on the details of navigational query language to be used.

The evaluation of the work will consider two highly relevant use cases. The first is ontology-based query answering over large knowledge graphs, which is an important challenge for modern data management systems. Our work will be based on Wikidata, the new knowledge graph of Wikipedia, as an ideal example of a complex, dynamic dataset of high practical relevance. As a second use case, we will consider the context awareness approach developed in B02 (Baader/Turhan). This is a well-specified problem for which any increase in performance can directly contribute to the success of HAEC. In particular, we expect synergies with the planned work in B02 (Baader/Turhan), B04 (Härtig) and B05 (Lehner). Moreover, the application data generated in this project will provide relevant input for the work in B07 (Castrillón Mazo) and A04 (Nagel). If successful, B08 will thus close the gap in an important application stack, and enable applications to take full advantage of the adaptive, energy-efficient platform developed in HAEC.


Journal Articles

Veronika Thost
Using Ontology-Based Data Access to Enable Context Recognition in the Presence of Incomplete Information (Extended Abstract)
KI, 31(4):377--380, 2017
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Markus Krötzsch, Tomáš Masopust, Michaël Thomazo
Complexity of Universality and Related Problems for Partially Ordered NFAs
Information and Computation, 255(1):177-192, August 2017
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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, Ilias Tachmazidis, Spyros Kotoulas, Grigoris Antoniou
Design and Evaluation of Small-Large Outer Joins in Cloud Computing Environments
Journal of Parallel and Distributed Computing, to appear
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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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Long Cheng, Spyros Kotoulas
Efficient Skew Handling for Outer Joins in a Cloud Computing Environment
IEEE Transactions on Cloud Computing, to appear
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Proceedings Articles

Adrian Bielefeldt, Julius Gonsior, Markus Krötzsch
Practical Linked Data Access via SPARQL: The Case of Wikidata
Proceedings of the WWW2018 Workshop on Linked Data on the Web (LDOW-18), CEUR Workshop Proceedings, to appear. 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
Proceedings of the 8th International Joint Conference on Automated Reasoning (IJCAR 2018), LNAI, to appear. Springer
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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), LNCS, to appear. Springer
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Markus Krötzsch, Maximilian Marx, Ana Ozaki, Veronika Thost
Attributed Description Logics: Reasoning on Knowledge Graphs
Proceedings of the 27th International Joint Conference on Artificial Intelligence (IJCAI'18), to appear. International Joint Conference on Artificial Intelligence
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Tomáš Masopust, Markus Krötzsch
Deciding Universality of ptNFAs is PSpace-Complete
In A Min Tjoa, Ladjel Bellatreche, Stefan Biffl, Jan van Leeuwen, Jiri Wiedermann, eds., Proceedings of the 44th International Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM 2018), volume 10706 of LNCS, 413-427, 2018. Spinger
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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: 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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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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Franz Baader, Stefan Borgwardt, Patrick Koopmann, Ana Ozaki, Veronika Thost
Metric Temporal Description Logics with Interval-Rigid Names
In Clare Dixon, Marcelo Finger, eds., Proceedings of the 11th International Symposium on Frontiers of Combining Systems (FroCoS'17), volume 10483 of Lecture Notes in Computer Science, 60--76, September 2017. Springer
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Alexander Krause, Thomas Kissinger, Dirk Habich, Hannes Voigt, Wolfgang Lehner
Partitioning Strategy Selection for In-Memory Graph Pattern Matching on Multiprocessor Systems
23rd International Conference on Parallel and Distributed Computing, Santiago de Compostela, Spain, to appear
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Veronika Thost
News on Temporal Conjunctive Queries
In Daniele Dell'Aglio, Darko Anicic, Payam M. Barnaghi, Emanuele Della Valle, Deborah L. McGuinness, Loris Bozzato, Thomas Eiter, Martin Homola, Daniele Porello, eds., Joint Proceedings of the Web Stream Processing workshop (WSP 2017) and the 2nd International Workshop on Ontology Modularity, Contextuality, and Evolution (WOMoCoE 2017) co-located with 16th International Semantic Web Conference (ISWC 2017), Vienna, Austria, October 22nd, 2017, volume 1936 of CEUR Workshop Proceedings, 1--16, October 2017. CEUR-WS.org
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Alexander Krause, Thomas Kissinger, Dirk Habich, Wolfgang Lehner
Asynchronous Graph Pattern Matching on Multiprocessor Systems
21st European Conference on Advances in Databases and Information Systems, Nicosia, Cyprus, to appear
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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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Markus Krötzsch, Maximilian Marx, Ana Ozaki, Veronika Thost
Reasoning with Attributed Description Logics
In Alessandro Artale, Birte Glimm, Roman Kontchakov, eds., Proceedings of the 30th International Workshop on Description Logics (DL 2017), Montpellier, France, July 18-21, 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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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, 2017. International Joint Conferences on Artificial Intelligence
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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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Markus Krötzsch, Tomáš Masopust, Michaël Thomazo
On the Complexity of Universality for Partially Ordered NFAs
In Piotr Faliszewski, Anca Muscholl, Rolf Niedermeier, eds., Proceedings of the 41st International Symposium on Mathematical Foundations of Computer Science (MFCS 2016), volume 58 of Leibniz International Proceedings in Informatics, 61:1--61:14, 2016. Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik
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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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Long Cheng, Tao Li
Efficient Data Redistribution to Speedup Big Data Analytics in Large Systems
Proc. 23rd IEEE International Conference on High Performance Computing (HiPC'16), 91-100, December 2016. IEEE
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Long Cheng, Spyros Kotoulas
Efficient Large Outer Joins over MapReduce
Proc. 22nd International European Conference on Parallel Processing (Euro-Par'16), 334-346, August 2016. Springer
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Alexander Krause, Hannes Voigt, Wolfgang Lehner
HUGS - A Lightweight Graph Partitioning Approach
Proceedings of the 28th GI-Workshop Grundlagen von Datenbanken, May 2016
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Veronika Thost, Erik Zenker
Temporal Query Answering in a Fuzzy World
In Agata Filipowska and Ruben Verborgh and Axel Polleres, eds., Posters&Demos@SEMANTiCS 2015 and DSci15 Workshop, volume 1481 of CEUR Workshop Proceedings, 84-87, September 2015. CEUR-WS.org
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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 Borgwardt, Veronika Thost
Temporal Query Answering in DL-Lite with Negation
In Georg Gottlob and Geoff Sutcliffe and Andrei Voronkov, eds., GCAI 2015. Global Conference on Artificial Intelligence, volume 36 of EasyChair Proceedings in Computing, 51-65, 2015. EasyChair
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Edited Proceedings

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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Steffen Hölldobler, Markus Krötzsch, Rafael Peñaloza Nyssen, Sebastian Rudolph
KI 2015: Advances in Artificial Intelligence - Proceedings of the 38th Annual German Conference on AI
Volume 9324 of LNAI, 2015. 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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Doctoral Theses

Veronika Thost
Using Ontology-Based Data Access to Enable Context Recognition in the Presence of Incomplete Information
Phd thesis, TU Dresden, 2017/06/19
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Technical Reports

Markus Krötzsch, Veronika Thost
Ontologies for Knowledge Graphs: Breaking the Rules
Technical Report, TU Dresden, April 2016
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Talks and Miscellaneous

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
Wikidata as a Cultural Heritage Information Hub
Invited talk at the Europeana Network Association AGM 2016, November 2016
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