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Documents authored by Vianu, Victor

Document
DOI: 10.4230/DagMan.7.1.1
Research Directions for Principles of Data Management (Dagstuhl Perspectives Workshop 16151)

Authors: Serge Abiteboul, Marcelo Arenas, Pablo Barceló, Meghyn Bienvenu, Diego Calvanese, Claire David, Richard Hull, Eyke Hüllermeier, Benny Kimelfeld, Leonid Libkin, Wim Martens, Tova Milo, Filip Murlak, Frank Neven, Magdalena Ortiz, Thomas Schwentick, Julia Stoyanovich, Jianwen Su, Dan Suciu, Victor Vianu, and Ke Yi

Published in: Dagstuhl Manifestos, Volume 7, Issue 1 (2018)

Abstract
The area of Principles of Data Management (PDM) has made crucial contributions to the development of formal frameworks for understanding and managing data and knowledge. This work has involved a rich cross-fertilization between PDM and other disciplines in mathematics and computer science, including logic, complexity theory, and knowledge representation. We anticipate on-going expansion of PDM research as the technology and applications involving data management continue to grow and evolve. In particular, the lifecycle of Big Data Analytics raises a wealth of challenge areas that PDM can help with. In this report we identify some of the most important research directions where the PDM community has the potential to make significant contributions. This is done from three perspectives: potential practical relevance, results already obtained, and research questions that appear surmountable in the short and medium term.
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Serge Abiteboul, Marcelo Arenas, Pablo Barceló, Meghyn Bienvenu, Diego Calvanese, Claire David, Richard Hull, Eyke Hüllermeier, Benny Kimelfeld, Leonid Libkin, Wim Martens, Tova Milo, Filip Murlak, Frank Neven, Magdalena Ortiz, Thomas Schwentick, Julia Stoyanovich, Jianwen Su, Dan Suciu, Victor Vianu, and Ke Yi. Research Directions for Principles of Data Management (Dagstuhl Perspectives Workshop 16151). In Dagstuhl Manifestos, Volume 7, Issue 1, pp. 1-29, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)

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@Article{abiteboul_et_al:DagMan.7.1.1,
  author =	{Abiteboul, Serge and Arenas, Marcelo and Barcel\'{o}, Pablo and Bienvenu, Meghyn and Calvanese, Diego and David, Claire and Hull, Richard and H\"{u}llermeier, Eyke and Kimelfeld, Benny and Libkin, Leonid and Martens, Wim and Milo, Tova and Murlak, Filip and Neven, Frank and Ortiz, Magdalena and Schwentick, Thomas and Stoyanovich, Julia and Su, Jianwen and Suciu, Dan and Vianu, Victor and Yi, Ke},
  title =	{{Research Directions for Principles of Data Management (Dagstuhl Perspectives Workshop 16151)}},
  pages =	{1--29},
  journal =	{Dagstuhl Manifestos},
  ISSN =	{2193-2433},
  year =	{2018},
  volume =	{7},
  number =	{1},
  editor =	{Abiteboul, Serge and Arenas, Marcelo and Barcel\'{o}, Pablo and Bienvenu, Meghyn and Calvanese, Diego and David, Claire and Hull, Richard and H\"{u}llermeier, Eyke and Kimelfeld, Benny and Libkin, Leonid and Martens, Wim and Milo, Tova and Murlak, Filip and Neven, Frank and Ortiz, Magdalena and Schwentick, Thomas and Stoyanovich, Julia and Su, Jianwen and Suciu, Dan and Vianu, Victor and Yi, Ke},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagMan.7.1.1},
  URN =		{urn:nbn:de:0030-drops-86772},
  doi =		{10.4230/DagMan.7.1.1},
  annote =	{Keywords: database theory, principles of data management, query languages, efficient query processing, query optimization, heterogeneous data, uncertainty, knowledge-enriched data management, machine learning, workflows, human-related data, ethics}
}
Document
DOI: 10.4230/LIPIcs.ICDT.2016.10
A Formal Study of Collaborative Access Control in Distributed Datalog

Authors: Serge Abiteboul, Pierre Bourhis, and Victor Vianu

Published in: LIPIcs, Volume 48, 19th International Conference on Database Theory (ICDT 2016)

Abstract
We formalize and study a declaratively specified collaborative access control mechanism for data dissemination in a distributed environment. Data dissemination is specified using distributed datalog. Access control is also defined by datalog-style rules, at the relation level for extensional relations, and at the tuple level for intensional ones, based on the derivation of tuples. The model also includes a mechanism for "declassifying" data, that allows circumventing overly restrictive access control. We consider the complexity of determining whether a peer is allowed to access a given fact, and address the problem of achieving the goal of disseminating certain information under some access control policy. We also investigate the problem of information leakage, which occurs when a peer is able to infer facts to which the peer is not allowed access by the policy. Finally, we consider access control extended to facts equipped with provenance information, motivated by the many applications where such information is required. We provide semantics for access control with provenance, and establish the complexity of determining whether a peer may access a given fact together with its provenance. This work is motivated by the access control of the Webdamlog system, whose core features it formalizes.
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Serge Abiteboul, Pierre Bourhis, and Victor Vianu. A Formal Study of Collaborative Access Control in Distributed Datalog. In 19th International Conference on Database Theory (ICDT 2016). Leibniz International Proceedings in Informatics (LIPIcs), Volume 48, pp. 10:1-10:17, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2016)

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@InProceedings{abiteboul_et_al:LIPIcs.ICDT.2016.10,
  author =	{Abiteboul, Serge and Bourhis, Pierre and Vianu, Victor},
  title =	{{A Formal Study of Collaborative Access Control in Distributed Datalog}},
  booktitle =	{19th International Conference on Database Theory (ICDT 2016)},
  pages =	{10:1--10:17},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-002-6},
  ISSN =	{1868-8969},
  year =	{2016},
  volume =	{48},
  editor =	{Martens, Wim and Zeume, Thomas},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2016.10},
  URN =		{urn:nbn:de:0030-drops-57794},
  doi =		{10.4230/LIPIcs.ICDT.2016.10},
  annote =	{Keywords: Distributed datalog, access control, provenance}
}
Document
DOI: 10.4230/LIPIcs.ICDT.2015.247
Process-Centric Views of Data-Driven Business Artifacts

Authors: Adrien Koutsos and Victor Vianu

Published in: LIPIcs, Volume 31, 18th International Conference on Database Theory (ICDT 2015)

Abstract
Declarative, data-aware workflow models are becoming increasingly pervasive. While these have numerous benefits, classical process-centric specifications retain certain advantages. Workflow designers are used to development tools such as BPMN or UML diagrams, that focus on control flow. Views describing valid sequences of tasks are also useful to provide stake-holders with high-level descriptions of the workflow, stripped of the accompanying data. In this paper we study the problem of recovering process-centric views from declarative, data-aware workflow specifications in a variant of IBM's business artifact model. We focus on the simplest and most natural process-centric views, specified by finite-state transition systems, and describing regular languages. The results characterize when process-centric views of artifact systems are regular, using both linear and branching-time semantics. We also study the impact of data dependencies on regularity of the views.
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Adrien Koutsos and Victor Vianu. Process-Centric Views of Data-Driven Business Artifacts. In 18th International Conference on Database Theory (ICDT 2015). Leibniz International Proceedings in Informatics (LIPIcs), Volume 31, pp. 247-264, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2015)

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@InProceedings{koutsos_et_al:LIPIcs.ICDT.2015.247,
  author =	{Koutsos, Adrien and Vianu, Victor},
  title =	{{Process-Centric Views of Data-Driven Business Artifacts}},
  booktitle =	{18th International Conference on Database Theory (ICDT 2015)},
  pages =	{247--264},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-79-8},
  ISSN =	{1868-8969},
  year =	{2015},
  volume =	{31},
  editor =	{Arenas, Marcelo and Ugarte, Mart{\'\i}n},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2015.247},
  URN =		{urn:nbn:de:0030-drops-49886},
  doi =		{10.4230/LIPIcs.ICDT.2015.247},
  annote =	{Keywords: Workflows, data-aware, process-centric, views}
}
Document
DOI: 10.4230/DagSemProc.08171.1
08171 Abstracts Collection – Beyond the Finite: New Challenges in Verification and Semistructured Data

Authors: Anca Muscholl, Ramaswamy Ramanujam, Michaël Rusinowitch, Thomas Schwentick, and Victor Vianu

Published in: Dagstuhl Seminar Proceedings, Volume 8171, Beyond the Finite: New Challenges in Verification and Semistructured Data (2008)

Abstract
From 20.04. to 25.04.2008, the Dagstuhl Seminar 08171 ``Beyond the Finite: New Challenges in Verification and Semistructured Data'' was held in the International Conference and Research Center (IBFI), Schloss Dagstuhl. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper. The first section describes the seminar topics and goals in general. Links to extended abstracts or full papers are provided, if available.
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Anca Muscholl, Ramaswamy Ramanujam, Michaël Rusinowitch, Thomas Schwentick, and Victor Vianu. 08171 Abstracts Collection – Beyond the Finite: New Challenges in Verification and Semistructured Data. In Beyond the Finite: New Challenges in Verification and Semistructured Data. Dagstuhl Seminar Proceedings, Volume 8171, pp. 1-14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2008)

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@InProceedings{muscholl_et_al:DagSemProc.08171.1,
  author =	{Muscholl, Anca and Ramanujam, Ramaswamy and Rusinowitch, Micha\"{e}l and Schwentick, Thomas and Vianu, Victor},
  title =	{{08171 Abstracts Collection – Beyond the Finite: New Challenges in Verification and Semistructured Data}},
  booktitle =	{Beyond the Finite: New Challenges in Verification and Semistructured Data},
  pages =	{1--14},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2008},
  volume =	{8171},
  editor =	{Anca Muscholl and Ramaswamy Ramanujam and Micha\"{e}l Rusinowitch and Thomas Schwentick and Victor Vianu},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.08171.1},
  URN =		{urn:nbn:de:0030-drops-15606},
  doi =		{10.4230/DagSemProc.08171.1},
  annote =	{Keywords: Infinite state systems, data values, verification, semistructured data}
}
Document
DOI: 10.4230/DagSemProc.08171.2
08171 Summary – Beyond the Finite: New Challenges in Verification and Semistructured Data

Authors: Anca Muscholl, Ramaswamy Ramanujam, Michaël Rusinowitch, Thomas Schwentick, and Victor Vianu

Published in: Dagstuhl Seminar Proceedings, Volume 8171, Beyond the Finite: New Challenges in Verification and Semistructured Data (2008)

Abstract
Exploring the interaction of model checking and database static analysis techniques in the development of novel approaches to the verification of software systems handling data.
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Anca Muscholl, Ramaswamy Ramanujam, Michaël Rusinowitch, Thomas Schwentick, and Victor Vianu. 08171 Summary – Beyond the Finite: New Challenges in Verification and Semistructured Data. In Beyond the Finite: New Challenges in Verification and Semistructured Data. Dagstuhl Seminar Proceedings, Volume 8171, pp. 1-4, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2008)

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@InProceedings{muscholl_et_al:DagSemProc.08171.2,
  author =	{Muscholl, Anca and Ramanujam, Ramaswamy and Rusinowitch, Micha\"{e}l and Schwentick, Thomas and Vianu, Victor},
  title =	{{08171 Summary – Beyond the Finite: New Challenges in Verification and Semistructured Data}},
  booktitle =	{Beyond the Finite: New Challenges in Verification and Semistructured Data},
  pages =	{1--4},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2008},
  volume =	{8171},
  editor =	{Anca Muscholl and Ramaswamy Ramanujam and Micha\"{e}l Rusinowitch and Thomas Schwentick and Victor Vianu},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.08171.2},
  URN =		{urn:nbn:de:0030-drops-15580},
  doi =		{10.4230/DagSemProc.08171.2},
  annote =	{Keywords: Infinite state systems, data values, verification, semistructured data}
}
Document
DOI: 10.4230/DagSemRep.253
Finite Model Theory, Databases, and Computer-Aided Verification (Dagstuhl Seminar 99401)

Authors: Georg Gottlob, Erich Grädel, Moshe Vardi, and Victor Vianu

Published in: Dagstuhl Seminar Reports. Dagstuhl Seminar Reports, Volume 1 (2021)

Abstract
Cite as

Georg Gottlob, Erich Grädel, Moshe Vardi, and Victor Vianu. Finite Model Theory, Databases, and Computer-Aided Verification (Dagstuhl Seminar 99401). Dagstuhl Seminar Report 253, pp. 1-25, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2000)

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@TechReport{gottlob_et_al:DagSemRep.253,
  author =	{Gottlob, Georg and Gr\"{a}del, Erich and Vardi, Moshe and Vianu, Victor},
  title =	{{Finite Model Theory, Databases, and Computer-Aided Verification (Dagstuhl Seminar 99401)}},
  pages =	{1--25},
  ISSN =	{1619-0203},
  year =	{2000},
  type = 	{Dagstuhl Seminar Report},
  number =	{253},
  institution =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemRep.253},
  URN =		{urn:nbn:de:0030-drops-151399},
  doi =		{10.4230/DagSemRep.253},
}
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