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<pre>
Preface
Datalog 2.0 is a workshop for Datalog researchers, implementors, and users.
Its aim is to bring together researchers and practitioners interested in different
aspects of Datalog to share research experiences, promote collaboration and
identify directions for joint future research.
    The 4th International Workshop on the Resurgence of Datalog in Academia
and Industry (Datalog 2.0 2022) was held in Genova Nervi, Italy, on September
5, 2022. Datalog 2.0 2022 was hosted by the 16th International Conference on
Logic Programming and Non-monotonic Reasoning (LPNMR 2022).
    The first edition of Datalog 2.0 was held in Oxford, UK, in 2010, and it
was by invitation only. Since Datalog has resurrected as a lively topic with
applications in many different areas of computer science, as well as industry, the
second edition of the workshop, which was held in Vienna, Austria, in 2012, was
open for submissions. The third edition was held in Philadelphia, PA (USA),
in 2019, and was also open for submissions.
    This edition of the workshop was also open for submissions, and 24 groups of
researchers submitted their articles to the peer review process. Each submission
was reviewed by at least 3 program committee members, and the committee
decided to accept 21 papers, based on their technical merit and potential for
stimulating discussions at the workshop. The program also includes an invited
talks by Reinhard Pichler.
    We acknowledge EasyChair (https://easychair.org/ for providing their
conference management system. Finally, we thanks all the authors who con-
tributed to the workshops and the Program Committee members for their effort
to produce timely and wise reviews.


August 29, 2022                                                   Mario Alviano
                                                                  Andreas Pieris




                                        i
Organization

 Program Chairs
 Mario Alviano               University of Calabria, Italy
 Andreas Pieris              University of Edinburgh, UK &
                             University of Cyprus, Cyprus

 Program Committee Members
 Marcelo Arenas            Pontificia Universidad Católica, Chile
 Leopoldo Bertossi         University Adolfo Ibáñez, Chile &
                           Skema Business School, Canada
 Marco Calautti            University of Trento, Italy
 Esra Erdem                Sabanci University, Turkey
 Jorge Fandinno            University of Nebraska, USA
 Cristina Feier            University of Bremen, Germany
 Roman Kontchakov          Birkbeck, University of London, UK
 Paraschos Koutris         University of Wisconsin-Madison, USA
 Markus Krötzsch          TU Dresden, Germany
 Matthias Lanzinger        University of Oxford, UK
 Domenico Lembo            Sapienza University of Rome, Italy
 Francesca Alessandra Lisi Università degli Studi di Bari ”Aldo Moro”, Italy
 Yanhong A. Liu            Stony Brook University, USA
 Marco Manna               University of Calabria, Italy
 Michael Morak             University of Klagenfurt, Austria
 Liat Peterfreund          Paris-Est University, France
 Torsten Schaub            University of Potsdam, Germany
 Mantas Simkus             TU Wien, Austria
 Tran Cao Son              New Mexico State University, USA

 Publicity Chair
 Jessica Zangari             University of Calabria, Italy




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