34th International Workshop on Description Logics, DL 2021
	      September 19-22, 2021 - Bratislava, Slovakia

  The DL workshop is the major annual event of the description logic
  research community. It is the forum in which those interested in
  description logics, both from academia and industry, meet to discuss
  ideas, share information and compare experiences. The 34th edition will
  be held in Bratislava, Slovakia from September 19th to 22nd, 2021, and
  will be collocated with a number of events as part of Bratislava
  Knowledge September (BAKS 2021, see 
  For more information on the DL workshop, see
  16 Jun 2021     Paper registration deadline
  23 Jun 2021     Paper submission deadline
  12 Jul 2021     Fast-track notification of acceptance (see below)
   9 Aug 2021     Notification of acceptance
  30 Aug 2021     Camera-ready version due
  19-22 Sep 2021  DL workshop

  We invite contributions on all aspects of description logics, including,
  but not limited to:
    * Foundations of description logics: 
      decidability and complexity of reasoning, expressive power, novel
      inference problems, inconsistency management, reasoning techniques, 
      modularisation, ontology extraction, abductive and inductive
    * Extensions of description logics: 
      closed-world and non-monotonic reasoning, epistemic reasoning,
      temporal and spatial reasoning, procedural knowledge, query answering,
      reasoning over dynamic information
    * Integration of description logics with other formalisms:
      object-oriented representation languages, database query languages,
      constraint-based programming, logic programming, and rule-based
    * Applications and use areas of description logics: 
      ontology engineering, ontology languages, databases, ontology-based 
      data access, semi-structured data, graph-structured data, linked 
      data, document management, natural language, learning, explanations, 
      planning, Semantic Web, cloud computing, conceptual modeling, 
      web services, business processes, practical experiences, case
      studies, feasibility studies
    * Systems and tools of all kinds around description logics: 
      reasoners, ontology editors, ontology alignment, ontology
      extraction, other support for ontology development, database
      schema design, query rewriting/answering/optimization, data
      integration, implementation and optimization techniques,
      benchmarking, evaluation, modelling
  Submissions may be of two types:

    A Regular papers of up to 11 pages (excluding references).
    B Abstracts of up to 2 pages (excluding references).
  Both regular papers and abstracts must be formatted using the Springer
  LNCS style with the correct fonts and submitted via:

  Submissions of type A must contain enough substance that it can be
  cited in other publications and may not have appeared before.  A
  clearly marked appendix with additional proofs and evaluation data may
  be included.

  Submissions of type B may optionally include a clearly marked appendix
  with additional proofs, evaluation data, or extended version of your
  paper, which was accepted at another conference or which you submitted
  or plan to submit to another conference. In the latter case the abstract
  should specify where the paper has been accepted or is under review.

  The appendix will be read at the discretion of the reviewers and will
  not be included in the proceedings. The appendix does not need to be
  in LNCS format.

  The proceedings will be submitted to for online publication.
  Due to a change of policy at papers of type B are no
  longer indexed by and the case of an abstract of a
  pre-published paper may require a permission by the copyright holder. 

  Accepted submissions of both types will be selected for either oral or
  poster presentation at the workshop. Submissions will be judged solely
  based on their content, and the type of submission will have no bearing
  on the decision between oral and poster presentation.

  Authors who require a visa to travel to Slovakia and for this
  reason would like to receive notification earlier than 12 July may
  request fast-track reviewing. To do so, authors should send an e-mail
  to, including the submission number of the paper
  and a statement explaining the circumstances that require fast-track

  Alessandro Artale, Free University of Bolzano-Bozen
  Franz Baader, TU Dresden
  Meghyn Bienvenu, CNRS, University of Bordeaux
  Stefan Borgwardt, TU Dresden
  David Carral, TU Dresden
  Ismail Ilkan Ceylan, University of Oxford
  Jieying Chen, University of Oslo
  Roberto Confalonieri, Free University of Bozen-Bolzano
  Bernardo Cuenca Grau, University of Oxford
  Cristina Feier, University of Bremen
  Laura Giordano, DISIT, Università del Piemonte Orientale
  Birte Glimm, Universität Ulm
  Victor Gutierrez-Basulto, Cardiff University
  Martin Homola, University of Bratislava
  Yazmin A. Ibanez-Garcia, Cardiff University
  Jean Christoph Jung, University of Hildesheim
  Yevgeny Kazakov, The University of Ulm
  Maria Keet, University of Cape Town
  Stanislav Kikot, Birkbeck College
  Boris Konev, University of Liverpool
  Patrick Koopmann, TU Dresden
  Egor V. Kostylev, University of Oxford
  Markus Krötzsch, TU Dresden
  Jakub Kuklis, University of Warsaw
  Oliver Kutz, Free University of Bozen-Bolzano
  Domenico Lembo, Sapienza University of Rome
  Carsten Lutz, Universität Bremen
  Barbara Morawska, Ahmedabad University
  Filip Murlak, University of Warsaw
  Linh Anh Nguyen, University of Warsaw
  Magdalena Ortiz, Vienna University of Technology
  Ana Ozaki, University of Bergen
  Fabio Papacchini, University of Liverpool
  Peter Patel-Schneider, Xerox PARC
  Rafael Peñaloza, University of Milano-Bicocca
  Andreas Pieris, The University of Edinburgh
  Antonella Poggi, Sapienza University of Rome 
  Denis Ponomaryov, Novosibirsk State University
  Guilin Qi, Southeast University
  Riccardo Rosati, Sapienza University of Rome
  Sebastian Rudolph, TU Dresden
  Vladislav Ryzhikov, Birkbeck College
  Leif Sabellek, University of Bremen
  Uli Sattler, The University of Manchester
  Stefan Schlobach, Vrije Universiteit Amsterdam
  Renate Schmidt, The University of Manchester
  Barış Sertkaya, Frankfurt University of Applied Sciences
  Mantas Simkus, TU Wien
  Viorica Sofronie-Stokkermans, University Koblenz-Landau
  Giorgos Stamou, National Technical University of Athens
  Umberto Straccia, ISTI-CNR
  David Toman, University of Waterloo
  Nicolas Troquard, Free University of Bozen-Bolzano
  Ivan Varzinczak, Univ. Artois and CNRS
  Grant Weddell, University of Waterloo
  Frank Wolter, University of Liverpool
  Yizheng Zhao, Nanjing University

  Martin Homola        University of Bratislava

  Vladislav Ryzhikov   Birkbeck College, London
  Renate Schmidt       The University of Manchester