Project: Heterogeneous Information Integration (HINT)

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HINT: Heterogeneous Information Integration

Project supported by the Austrian Science Fund (FWF) under grant P25207-N23.


Contents


Duration:

The project started at December 1, 2012 and has the duration of 3 years.

Project team

Project Leader:

Project Staff (DBAI):

Goal of the project

The number of high quality datasets available on the web is steadily increasing. These data usually come in different formats — above all as relational, XML, and RDF data. Moreover, they are accessed via specific query languages such as SQL, XQuery, and SPARQL, respectively. However, applications are usually designed for a unified access to these diverse data. The integration of heterogeneous information is thus becoming an increasingly important challenge.

Information integration has evolved as a particularly active area of database research and enormous progress has been made in recent years. However, most of the research so far has been devoted to relational data. Other data formats like XML and RDF have received far less attention. A systematic study of information integration in a heterogeneous setting (where relational, XML, and RDF data have to be handled at the same time) is missing to date.

The focus of the HINT project is thus on heterogeneous information integration, including various schema mapping languages expressing relationships between database instances of different formats.

Publications

2018

[70]
CloudVoting: Analyzing Preferences using Spark and GraphX.
T. Csar.
In 11th Multidisciplinary Workshop on Advances in Preference Handling; 2018; Paper-Nr 11, 8 pages. [ pdf  ]
[69]
Limits of Schema Mappings.
P. G. Kolaitis, R. Pichler, E. Sallinger, V. Savenkov.
In Theory of Computing Systems: 62(4); Springer, 2018; p. 899-940. DOI: 10.1007/s00224-017-9812-7 [ pdf  ]
[68]
The Impact of Active Domain Predicates on Guarded Existential Rules.
G. Gottlob, A. Pieris, M. Simkus.
In Fundamenta Informaticae: 159(1-2); IOS Press 2018; p. 123-146. DOI: 10.3233/FI-2018-1660 [ pdf  ]

2017

[67]
Ranking Specific Sets of Objects.
J. Maly and S. Woltran.
In Datenbank Spektrum - Zeitschrift für Datenbanktechnologie und Information Retrieval: 17(3); Springer 2017; p. 255 - 265. DOI: 10.1007/s13222-017-0264-7 [ pdf  ]
[66]
Ranking Specific Sets of Objects.
J. Maly and S. Woltran.
In Datenbanksysteme für Business, Technologie und Web (BTW 2017), 6.-10. Mä 2017, Stuttgart, Workshopband; Lecture Notes in Informatics (LNI), Gesellschaft für Informatik, Bonn 2017; p. 193-201. [ pdf  ]
[65]
On the Complexity of Enumerating the Extensions of Abstract Argumentation Frameworks.
M. Kröll, R. Pichler, S. Woltran.
In Proceedings of the Twenty-Sixth International Joint Conference on Artificial Intelligence, IJCAI 2017, Melbourne, Australia, August 19-25; ijcai.org, 2017, p. 1145 - 1152. DOI: 10.24963/ijcai.2017/159 [ pdf  ]
[64]
Function Symbols in Tuple-Generating Dependencies: Expressive Power and Computability.
G. Gottlob, R. Pichler, E. Sallinger.
In Proceedings of the 11th Alberto Mendelzon International Workshop on Foundations of Data Management and the Web, Montevideo, Uruguay, June 7-9, 2017; CEUR Workshop Proceedings / CEUR-WS.org, 1912 (2017), PaperNr. 21, 1 - 5 pages. [ pdf  ]
[63]
Winner Determination in Huge Elections with MapReduce.
T. Csar, M. Lackner, R. Pichler, E. Sallinger.
In Proceedings of the Thirty-First AAAI Conference on Artificial Intelligence; February 4-9, 2017, San Francisco, California, USA. AAAI 2017, p. 451-458. [ pdf  ]
[62]
Computational Social Choice in the Clouds.
T. Csar, M. Lackner, R. Pichler, E. Sallinger.
In Datenbanksysteme für Business, Technologie und Web (BTW 2017) Workshopband; Gesellschaft für Informatik e.V., 2017; p. 163 - 167. [ pdf  ]
[61]
On the Complexity of Hard Enumeration Problems.
N. Creignou, M. Kröll, R. Pichler, S. Skritek, H. Vollmer.
In Language and Automata Theory and Applications - 11th International Conference, LATA 2017, Umea, Sweden, March 6-9, 2017, Proceedings; Lecture Notes in Computer Science: 10168, Springer 2017; p. 183 - 195. DOI: 10.1007/978-3-319-53733-7_13 [ pdf  ]

2016

[60]
Fuzzy data exchange.
R. Pichler, J. Medina.
In Fuzzy Sets and Systems: 301; Elsevier 2016; p. 129 - 145. [ pdf  ]
[59]
Closed Predicates in Description Logics: Results on Combined Complexity.
N. Ngo, M. Ortiz de la Fuente, M. Simkus.
In Principles of Knowledge Representation and Reasoning: Proceedings of the Fifteenth International Conference, KR 2016, Cape Town, South Africa, April 25-29, 2016; C. Baral, J. Delgrande, F. Wolter (Hrg.); AAAI Press, 2016, pages. 237 - 246. [ pdf  ]
[58]
Closed Predicates in Description Logics: Results on Combined Complexity.
N. Ngo, M. Ortiz de la Fuente, M. Simkus.
In Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016; R. Pichler, A. da Silva (Hrg.); CEUR Workshop Proceedings: 1644, 2016, Paper-Nr. 8, 5 pages. [ pdf  ]
[57]
On the Complexity of Enumerating the Answers to Well-designed Pattern Trees.
M. Kröll, R. Pichler, S. Skritek.
In Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016; R. Pichler, A. da Silva (Hrg.); CEUR Workshop Proceedings: 1644, 2016; Paper-Nr. 14, 5 pages. [ pdf  ]
[56]
On the Complexity of Enumerating the Answers to Well-designed Pattern Trees.
M. Kröll, R. Pichler, S. Skritek.
In Proceedings of the 19th International Conference on Database Theory, ICDT 2016, Bordeaux, France, March 15-18, 2016; W. Martens, T. Zeume (Hrg.); Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, LIPIcs: 48, 2016, Paper-Nr. 22, 18 pages. DOI: 10.4230/LIPIcs.ICDT.2016.22 [ pdf  ]
[55]
Limits of Schema Mappings.
P. Kolaitis, R. Pichler, E. Sallinger, V. Savenkov.
In Proceedings of the 19th International Conference on Database Theory, ICDT 2016, Bordeaux, France, March 15-18, 2016; W. Martens, T. Zeume (Hrg.); Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, LIPIcs 48, 2016; Paper-Nr. 19, 17 pages. DOI: 10.4230/LIPIcs.ICDT.2016.19 [ pdf  ]
[54]
The Impact of Active Domain Predicates on Guarded Existential Rules.
G. Gottlob, A. Pieris, M. Simkus.
In Web Reasoning and Rule Systems - 10th International Conference, RR 2016, Aberdeen, UK, September 9-11, 2016, Proceedings; M. Ortiz de la Fuente, S. Schlobach (Hrg.); Lecture Notes in Computer Science: 9898, Springer 2016, p. 94 - 110. DOI: 10.1007/978-3-319-45276-0_8 [ pdf  ]
[53]
Winner Determination in Huge Elections with MapReduce.
T. Csar, M. Lackner, R. Pichler, E. Sallinger.
In 10th Multidisciplinary Workshop on Advances in Preference Handling; M. Endres, N. Mattei, A. Pfandler (Hrg.); 2016; Paper-Nr 3, 7 pages. [ pdf  ]
[52]
Verification of Evolving Graph-structured Data under Expressive Path Constraints.
D. Calvanese, M. Ortiz de la Fuente, M. Simkus.
In Proceedings of the 19th International Conference on Database Theory, ICDT 2016, Bordeaux, France, March 15-18, 2016", W. Martens, T. Zeume (Hrg.); Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, LIPIcs 48 (2016), p. 1 - 19. DOI: 10.4230/LIPIcs.ICDT.2016.15 [ pdf  ]
[51]
Guarded-Based Disjunctive Tuple-Generating Dependencies.
P. Bourhis, M. Manna, M. Morak, A. Pieris.
In ACM Transactions on Database Systems (TODS) - Invited Paper from EDBT 2015, Invited Paper from PODS 2015 and Regular Papers: 41 (4). ACM, (2016). Article Nr. 27, 45 pages. DOI: 10.1145/2976736 [ pdf  ]
[50]
Ontology-Mediated Queries Distributing over Components.
G. Berger, A. Pieris.
In Proceedings of the Twenty-Fifth International Joint Conference on Artificial Intelligence, IJCAI 2016, New York, NY, USA, 9-15 July 2016; S. Kambhampati (Hrg.); IJCAI/AAAI Press, (2016), ISBN: 978-1-57735-770-4; p. 943 - 949. [ pdf  ]
[49]
Semantic Acyclicity Under Constraints.
P. Barceló, G. Gottlob, A. Pieris.
In Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016; R. Pichler, A. da Silva (Hrg.); CEUR Workshop Proceedings, 1644 (2016), Paper-Nr. 6, 5 pages. [ pdf  ]
[48]
Semantic Acyclicity Under Constraints.
P. Barceló, G. Gottlob, A. Pieris.
In Proceedings of the 35th ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems, PODS 2016, San Francisco, CA, USA, June 26 - July 01, 2016; T. Milo, W. Tang (Hrg.); ACM, (2016), ISBN: 978-1-4503-4191-2; p. 343 - 354. DOI: 10.1145/2902251.2902302 [ pdf  ]
[47]
Complexity of Repair Checking and Consistent Query Answering.
S. Arming, R. Pichler, E. Sallinger.
In Proceedings of the 19th International Conference on Database Theory, ICDT 2016, Bordeaux, France, March 15-18, 2016; W. Martens, T. Zeume (Hrg.); Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, LIPIcs 48 (2016), Paper-Nr. 21, 18 pages. [ pdf  ]
[46]
A Datalog-Based Language for Querying RDF Graphs.
M. Arenas, G. Gottlob, A. Pieris.
In Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016; R. Pichler, A. da Silva (Hrg.); CEUR Workshop Proceedings, 1644 (2016), Paper-Nr. 17, 4 pages. [ pdf  ]
[45]
A Compilation Technique for Interactive Ontology-mediated Data Exploration.
M. Andresel, M. Ortiz de la Fuente, M. Simkus.
In Proceedings of the 29th International Workshop on Description Logics, Cape Town, South Africa, April 22-25, 2016; M. Lenzerini, R. Penaloza (Hrg.); CEUR Workshop Proceedings / CEUR-WS.org, 1577 (2016), Paper-Nr. 37, 12 pages. [ pdf  ]
[44]
Polynomial Disjunctive Datalog Rewritings of Instance Queries in Expressive Description Logics.
S. Ahmetaj, M. Ortiz de la Fuente, M. Simkus.
In Proceedings of the 29th International Workshop on Description Logics, Cape Town, South Africa, April 22-25, 2016; M. Lenzerini, R. Penaloza (Hrg.); CEUR Workshop Proceedings / CEUR-WS.org, 1577 (2016), Paper-Nr. 26, 13 pages. [ pdf  ]
[43]
Polynomial Datalog Rewritings for Expressive Description Logics with Closed Predicates.
S. Ahmetaj, M. Ortiz de la Fuente, M. Simkus.
In Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016; R. Pichler, A. da Silva (Hrg.); CEUR Workshop Proceedings, 1644 (2016), Paper-Nr. 19, 5 pages. [ pdf  ]
[42]
Polynomial Datalog Rewritings for Expressive Description Logics with Closed Predicates.
S. Ahmetaj, M. Ortiz de la Fuente, M. Simkus.
In Proceedings of the Twenty-Fifth International Joint Conference on Artificial Intelligence, IJCAI 2016, New York, NY, USA, 9-15 July 2016; S. Kambhampati (Hrg.); IJCAI/AAAI Press, (2016), ISBN: 978-1-57735-770-4; p. 878 - 885. [ pdf  ]

2015

[41]
Binary Frontier-Guarded ASP with Function Symbols.
M. Simkus.
In Rule Technologies: Foundations, Tools, and Applications - 9th International Symposium (RuleML 2015); N. Bassiliades, G. Gottlob, F. Sadri, A. Paschke, D. Roman (Hrg.); Springer LNCS: 9202, 2015; p. 311 - 327. DOI: 10.1007/978-3-319-21542-6_20 [ pdf  ]
[40]
Distance-Bounded Consistent Query Answering.
A. Pfandler, E. Sallinger.
In Proceedings of the Twenty-Fourth International Joint Conference on Artificial Intelligence, IJCAI 2015; Q. Yang, M. Wooldridge (Hrg.); AAAI Press, 2015; p. 2262 - 2269. [ pdf  ]
[39]
The Combined Complexity of Reasoning with Closed Predicates in Description Logics.
N. Ngo, M. Ortiz de la Fuente, M. Simkus.
In Proceedings of the 28th International Workshop on Description Logics, Athens,Greece, June 7-10, 2015; D. Calvanese, B. Konev (Hrg.); CEUR Workshop Proceedings, 1350 (2015); Paper-Nr. 34 ,p. 249 - 261. [ pdf  ]
[38]
From Classical to Consistent Query Answering under Existential Rules.
T. Lukasiewicz, M. V. Martinez, A. Pieris, G. I. Simari.
In Proceedings of the 9th Alberto Mendelzon International Workshop on Foundations of Data Management, Lima, Peru, May 6 - 8, 2015; CEUR Workshop Proceedings: 1378; CEUR, 2015; Paper-Nr 9, 6 pages. [ pdf  ]
[37]
Beyond SPARQL under OWL 2 QL Entailment Regime: Rules to the Rescue.
T. Lukasiewicz, M. V. Martinez, A. Pieris, G. I. Simari.
In Proceedings of the Twenty-Ninth AAAI Conference on Artificial Intelligence, January 25-30, 2015, Austin, Texas, USA. AAAI-Press 2015; p. 1546-1552. [ pdf  ]
[36]
Beyond SPARQL under OWL 2 QL Entailment Regime: Rules to the Rescue.
G. Gottlob, A. Pieris.
In Proceedings of the Twenty-Fourth International Joint Conference on Artificial Intelligence, IJCAI 2015, Buenos Aires, Argentina, July 25-31, 2015; AAAI Press 2015; p. 2999-3007. [ pdf  ]
[35]
Polynomial Combined Rewritings for Linear Existential Rules and DL-Lite with n-ary Relations.
G. Gottlob, M. Manna, A. Pieris.
In Proceedings of the Twenty-Fourth International Joint Conference on Artificial Intelligence, IJCAI 2015, Buenos Aires, Argentina, July 25-31, 2015; AAAI Press 2015; p. 2992—2998. [ pdf  ]
[34]
Polynomial Combined Rewritings for Linear Existential Rules and DL-Lite with n-ary Relations.
G. Gottlob, M. Manna, A. Pieris.
In Proceedings of the 28th International Workshop on Description Logics, Athens,Greece, June 7-10, 2015; CEUR Workshop Proceedings: 1350; CEUR 2015; Paper-Nr 22, 4 pages. DOI: 10.1145/2745754.2745756 [ pdf  ]
[33]
Function Symbols in Tuple-Generating Dependencies: Expressive Power and Computability.
G. Gottlob, R. Pichler, E. Sallinger.
In Proceedings of the 34th ACM Symposium on Principles of Database Systems, PODS 2015, Melbourne, Victoria, Australia, May 31 - June 4, 2015; T. Milo, D. Calvanese (Hrg.); ACM, (2015); p. 65 - 77. DOI: 10.1145/2745754.2745756 [ pdf  ]
[32]
On the undecidability of the equivalence of second-order tuple generating dependencies.
I. Feinerer, R. Pichler, E. Sallinger, V. Savenkov.
In Information Systems: 48 (2015), p. 113 - 129. DOI: 10.1016/j.is.2014.09.003 [ pdf  ]
[31]
Lossless Selection Views under Conditional Domain Constraints.
I. Feinerer, E. Franconi, P. Guagliardo. In IEEE Transactions on Knowledge and Data Engineering: 27(2); IEEE, 2015; p. 504-517. DOI: 10.1109/TKDE.2014.2334327 [ pdf  ]
[30]
Linking Open-World Knowledge Bases Using Nonmonotonic Rules.
T. Eiter, M. Simkus. In Logic Programming and Nonmonotonic Reasoning - 13th International Conference (LPNMR 2015); Lecture Notes in Computer Science: 9345; Springer, 2015; p. 294 - 308. DOI: 10.1007/978-3-319-23264-5_25 [ pdf  ]
[29]
A Rule-based Framework for Creating Instance Data from OpenStreetMap.
T. Eiter, J. Z. Pan, P. Schneider, M. Simkus, G. Xiao. In Web Reasoning and Rule Systems - 9th International Conference, RR 2015, Berlin, Germany, August 4-5, 2015, Proceedings; B. ten Cate, A. Mileo (Hrg.); Springer LNCS: 9209 (2015), ISBN: 978-3-319-22001-7; p. 93 - 104. [ pdf  ]
[28]
Using Statistics for Computing Joins with MapReduce.
T. Csar, R. Pichler, E. Sallinger, V. Savenkov.
In Proceedings of the 9th Alberto Mendelzon International Workshop on Foundations of Data Management, Lima, Peru, May 6 - 8, 2015; A. Cali, M. Vidal (Hrg.); CEUR Workshop Proceedings: 1378 (2015), Paper-Nr. 13, 6 pages. [ pdf  ]
[27]
Chase Termination for Guarded Existential Rules.
M. Calautti, G. Gottlob, A. Pieris.
In Proceedings of the 9th Alberto Mendelzon International Workshop on Foundations of Data Management, Lima, Peru, May 6 - 8, 2015; A. Cali, M. Vidal (Hrg.); CEUR Workshop Proceedings, 1378 (2015), Paper-Nr. 28, 6 pages. [ pdf  ]
[26]
Chase Termination for Guarded Existential Rules.
M. Calautti, G. Gottlob, A. Pieris.
In Proceedings of the 34th ACM Symposium on Principles of Database Systems, PODS 2015, Melbourne, Victoria, Australia, May 31 - June 4, 2015; T. Milo, D. Calvanese (Hrg.); ACM, (2015), ISBN: 978-1-4503-2757-2; S. 91 - 103. DOI: 10.1145/2745754.2745773 [ pdf  ]
[25]
Navigational Queries Based on Frontier-Guarded Datalog: Preliminary Results.
M. Bienvenu, M. Ortiz de la Fuente, M. Simkus.
In Proceedings of the 9th Alberto Mendelzon International Workshop on Foundations of Data Management, Lima, Peru, May 6 - 8, 2015; CEUR Workshop Proceedings, 1378 (2015), ISSN: 1613-0073; Paper-Nr. 33, p. 162 - 171. [ pdf  ]
[24]
Efficient Evaluation and Approximation of Well-designed Pattern Trees (Extended Abstract).
P. Barceló, R. Pichler, S. Skritek.
In Proceedings of the 9th Alberto Mendelzon International Workshop on Foundations of Data Management, Lima, Peru, May 6 - 8, 2015; A. Cali, M. Vidal (Hrg.); CEUR Workshop Proceedings, 1378 (2015), Paper-Nr. 5, 6 pages. [ pdf  ]
[23]
Efficient Evaluation and Approximation of Well-designed Pattern Trees.
P. Barceló, R. Pichler, S. Skritek.
In Proceedings of the 34th ACM Symposium on Principles of Database Systems, PODS 2015, Melbourne, Victoria, Australia, May 31 - June 4, 2015; T. Milo, D. Calvanese (Hrg.); ACM, (2015), ISBN: 978-1-4503-2757-2; p. 131 - 144. DOI: 10.1145/2745754.2745767 [ pdf  ]
[22]
Default Negation for Non-Guarded Existential Rules.
M. Alviano, A. Pieris.
In Proceedings of the 34th ACM Symposium on Principles of Database Systems, PODS 2015, Melbourne, Victoria, Australia, May 31 - June 4, 2015; T. Milo, D. Calvanese (Hrg.); ACM, (2015), ISBN: 978-1-4503-2757-2; p. 79 - 90. DOI: 10.1145/2745754.2745758 [ pdf  ]
[21]
Towards Reconciling SPARQL and Certain Answers (Extended Abstract).
S. Ahmetaj, W. Fischl, R. Pichler, M. Simkus, S. Skritek.
In Proceedings of the 9th Alberto Mendelzon International Workshop on Foundations of Data Management, Lima, Peru, May 6 - 8, 2015; A. Cali, M. Vidal (Hrg.); CEUR Workshop Proceedings, 1378 (2015), Paper-Nr. 4, 6 pages. [ pdf  ]
[20]
Towards Reconciling SPARQL and Certain Answers.
S. Ahmetaj, W. Fischl, R. Pichler, M. Simkus, S. Skritek.
In Proceedings of the 24th International Conference on World Wide Web, WWW 2015, Florence, Italy, May 18-22, 2015; A. Gangemi, L. Stefano, A. Panconesi (Hrg.); ACM, (2015), ISBN: 978-1-4503-3469-3; p. 23 - 33. DOI: 10.1145/2736277.2741636 [ pdf  ]
[19]
DL-Lite and Conjunctive Queries Extended by Optional Matching.
S. Ahmetaj, W. Fischl, R. Pichler, M. Simkus, S. Skritek.
In Proceedings of the 28th International Workshop on Description Logics, Athens,Greece, June 7-10, 2015; D. Calvanese, B. Konev (Hrg.); CEUR Workshop Proceedings: 1350 (2015), Paper-Nr. 4, 4 pages. [ pdf  ]

2014

[18]
Containment and equivalence of well-designed SPARQL.
R. Pichler, S. Skritek.
In Proceedings of the 33rd ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database Systems, PODS'14, Snowbird, UT, USA, June 22-27, 2014; ACM Press, 2014; p. 39-50. DOI: 10.1145/2594538.2594542 [ pdf  ]
[17]
On the Hardness of Counting the Solutions of SPARQL Queries.
R. Pichler, S. Skritek.
In Proceedings of the 8th Alberto Mendelzon Workshop on Foundations of Data Management, Cartagena de Indias, Colombia, June 4-6, 2014; CEUR Workshop Proceedings: 1189; CEUR 2014; Paper-Nr 14, 6 pages. [ pdf  ]
[16]
A Fuzzy Extension of Data Exchange.
J. Medina, R. Pichler.
In Information Processing and Management of Uncertainty in Knowledge-Based Systems - 15th International Conference, IPMU 2014, Montpellier, France, July 15-19, 2014, Proceedings, Part II; Communications in Computer and Information Science: 443; Springer, 2014; p. 214-223. DOI: 10.1007/978-3-319-08855-6_22 [ pdf  ]
[15]
Nested dependencies: structure and reasoning.
P. G. Kolaitis, R. Pichler, E. Sallinger, V. Savenkov.
In Proceedings of the 33rd ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database Systems, PODS'14, Snowbird, UT, USA, June 22-27, 2014; ACM Press, 2014; p. 176-187.. DOI: 10.1145/2594538.2594544 [ pdf  ]
[14]
Expressiveness of guarded existential rule languages.
G. Gottlob, S. Rudolph, M. Simkus.
In Proceedings of the 33rd ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database Systems, PODS'14; R. Hull, M. Grohe (Hrg.); ACM Press, 2014, p. 27 - 38. DOI: 10.1145/2594538.2594556 [ pdf  ]
[13]
VMAP: A Visual Schema Mapping Tool.
F. Chertes, I. Feinerer.
In ECAI 2014 - 21st European Conference on Artificial Intelligence, 18-22 August 2014, Prague, Czech Republic - Including Prestigious Applications of Intelligent Systems (PAIS 2014); Frontiers in Artificial Intelligence and Applications: 263; IOS Press 2014; p. 1223-1224. DOI: 10.3233/978-1-61499-419-0-1223 [ pdf  ]
[12]
Expressive Identification Constraints to Capture Functional Dependencies in Description Logics.
D. Calvanese, W. Fischl, R. Pichler, E. Sallinger, M. Simkus.
In Informal Proceedings of the 27th International Workshop on Description Logics (DL 2014); CEUR-WS, Vol-1193 (2014), ISSN: 1613-0073; PaperNr-48, 5 pages. [ pdf  ]
[11]
Capturing Relational Schemas and Functional Dependencies in RDFS.
D. Calvanese, W. Fischl, R. Pichler, E. Sallinger, M. Simkus.
In Proceedings of the Twenty-Eighth AAAI Conference on Aritifical Intelligence", (2014), p. 1003 - 1011. [ pdf  ]
[10]
Combined Complexity of Repair Checking and Consistent Query Answering.
S. Arming, R. Pichler, E. Sallinger.
In Proceedings of the 8th Alberto Mendelzon Workshop on Foundations of Data Management, Cartagena de Indias, Colombia, June 4-6, 2014; G. Gottlob, J. Perez (Hrg.); CEUR, 2014, PaperNr-5, 6 pages. [ pdf  ]

2013

[9]
Loop Elimination for Database Updates.
V. Savenkov, R. Pichler, C. Koch.
In Big Data - 29th British National Conference on Databases, BNCOD 2013, Oxford, UK, Julys 8-10, 2013. Proceedings; G. Gottlob, G. Grasso, D. Olteanu, C. Schallhart (Hrg.); LNCS/Springer: 7968, 2013, p. 48 - 61. DOI: 10.1007/978-3-642-39467-6_8 [ pdf  ]
[8]
Algorithms for Core Computation in Data Exchange.
V. Savenkov.
In Data Exchange, Integration, and Streams; Dagstuhl Follow-Ups: 5; Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, Germany, 2013; p. 38 - 68. DOI: 10.4230/DFU.Vol5.10452.38 [ pdf  ]
[7]
Reasoning about Schema Mappings.
E. Sallinger.
In Data Exchange, Integration, and Streams; Dagstuhl Follow-Ups: 5; Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, Germany, 2013; p. 97 - 127. DOI: 10.4230/DFU.Vol5.10452.97 [ pdf  ]
[6]
Peer Data Management.
A. Roth, S. Skritek.
In Data Exchange, Integration, and Streams; Dagstuhl Follow-Ups: 5; Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, Germany, 2013; p. 185 - 215. DOI: 10.4230/DFU.Vol5.10452.185 [ pdf  ]
[5]
Static analysis and optimization of semantic web queries.
A. Letelier, J. Pérez, R. Pichler, S. Skritek.
In ACM Transactions on Database Systems (TODS): 38(4); ACM, 2013; p. 25:1-25:45. DOI: 10.1145/2500130 [ pdf  ]
[4]
Efficient Updates of Uncertain Databases.
A. Hubmer, R. Pichler, V. Savenkov, S. Skritek.
In Proceedings of the 7th Alberto Mendelzon International Workshop on Foundations of Data Management Puebla/Cholula, Mexico, May 21-23, 2013; L. Bravo, M. Lenzerini (Hrg.); CEUR-WS, Vol-1087, 2013; Paper-Nr. 9, 7 pages. [ pdf  ]
[3]
Enhancing the Updatability of Projective Views.
P. Guagliardo, R. Pichler, E. Sallinger.
In Proceedings of the 7th Alberto Mendelzon International Workshop on Foundations of Data Management; CEUR Workshop Proceedings: 1087, 2013; PaperNr , 7 pages. [ pdf  ]
[2]
UMAP: A Universal Layer for Schema Mapping Languages.
F. Chertes, I. Feinerer.
In Database and Expert Systems Applications - 24th International Conference, DEXA 2013, Prague, Czech Republic, August 26-29, 2013. Proceedings, Part II; Lecture Notes in Computer Science: 8056; Springer 2013; p. 349-363. DOI: 10.1007/978-3-642-40173-2_28 [ pdf  ]
[1]
Towards General Representability in Knowledge Exchange.
M. Arenas, J. Perez, E. Sallinger.
In Proceedings of the 7th Alberto Mendelzon International Workshop on Foundations of Data Management; CEUR Workshop Proceedings, 1087 (2013), ISSN: 1613-0073; 7 S.. [ pdf  ]

Non Peer-Reviewed Publications / Invited Talks

2017

[71]
The Challenge of Optional Matching in SPARQL.
S. Ahmetaj, W. Fischl, M. Kröll, R. Pichler, M. Simkus, S. Skritek.
Invited Keynote Talk given by R. Pichler
In Foundations of Information and Knowledge Systems - 9th International Symposium, FoIKS 2016, Linz, Austria, March 7-11, 2016. Proceedings; Lecture Notes in Computer Science: 9616; Springer 2016; p. 169 - 190. DOI: 10.1007/978-3-319-30024-5_10 [ pdf  ]

2015

[72]
Default Negation for Datalog+/-.
A. Pieris.
Invited Talk given by A. Pieris
Presented at 3rd Workshop on Grounding, Transforming, and Modularizing Theories with Variables co-located with the 13th International Conference on Logic Programming and Non-monotonic Reasoning, Lexington, KY, USA September 27-30, 2015. [ pdf  ]
[73]
From Classical to Consistent Query Answering under Existential Rules.
A. Pieris.
Invited Talk given by A. Pieris
In Proceedings of the Joint Ontology Workshops 2015 Episode 1: The Argentine Winter of Ontology co-located with the 24th International Joint Conference on Artificial Intelligence (IJCAI 2015), Buenos Aires, Argentina, July 25-27, 2015; CEUR Workshop Proceedings: 1517; CEUR, 2015; Paper-Nr 2, 1 page. [ pdf  ]