=Paper= {{Paper |id=Vol-2726/xpreface |storemode=property |title=None |pdfUrl=https://ceur-ws.org/Vol-2726/xpreface.pdf |volume=Vol-2726 }} ==None== https://ceur-ws.org/Vol-2726/xpreface.pdf 
          Preface of the Workshop Organizers
    The Second International Workshop on “Challenges and Experiences from
Data Integration to Knowledge Graphs” (DI2KG 2020) hosted different contri-
butions on data integration problems from noisy and heterogeneous sources.
    These problems have been studied by different research communities, and
we claim the need for a more cross-disciplinary approach. For this reason, we
proposed to participants a broad spectrum of topics, including every possible
step of an ideal pipeline that starts from data extraction from the Web to the
construction of a complete and correct knowledge graph.
    We also hosted the DI2KG challenge: we provided a dataset of product spec-
ifications extracted from the Web, suggested a set of fundamental integration
tasks with their own manually-checked ground truth, and published a weekly
updated leaderboard to help researchers evaluate their solution against com-
petitors.
    Submitted papers underwent a zero-blind review process. The challenge
finalists had the opportunity to publish a paper describing their solution, which
went through a light review process. We also accepted papers from finalists of
the SIGMOD 2020 Programming Contest1 , with a similar goal but focused also
on efficiency of solutions.
    The workshop was held online due to the ongoing pandemic, and about 40
people from different research communities and industries participated.2 We
had three invited speakers (William W. Cohen from Google, Renée Miller from
Northeastern University, and Mike Tung from Diffbot), the presentation of 6 pa-
pers, and a student panel with 3 speakers (Bahar Ghadiri Bashardoost from Uni-
versity of Toronto, Riccardo Cappuzzo from EURECOM and Daniel Obraczka
from ScaDS) moderated by Donatella Firmani.
    All of the participants underlined the importance of benchmarks, and pan-
elists as well as organizers were happy with the discussion and ideas that
emerged from the discussion. Overall we are confident that new editions of
DI2KG can stimulate new research on holistic data integration methods, and
help building a community that can contribute to the evolution of the DI2KG
challenge benchmark.
    We would like to thank the program committee members for their work in
the review process: Edward Porter, Domenico Beneventano, Christian Bizer,
Yash Govind, Laure Berti-Equille, Daniel Obraczka, Martin Theobald, Juan F.
Sequeda, Colin Lockard, Nicholas Monath, Denilson Barbosa, Mourad Ouzzani,
and H. V. Jagadish. Finally, we thank the authors of submitted papers, the
challenge participants, invited speakers, panelists and workshop attendees who
contributed to the success of the event.
    October 2020
 Federico Piai, Donatella Firmani, Divesh Srivastava, Xin Luna Dong, Andrea
                                de Angelis, Maurizio Mazzei, Paolo Merialdo.
  1 http://www.inf.uniroma3.it/db/sigmod2020contest/index.html
  2 The detailed workshop program is available on-line at http://di2kg.dia.uniroma3.it/2020.




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