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ORCIDReinhard Pichler
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- affiliation: TU Wien, Vienna, Autria
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2020 – today
- 2024
[j50]Mahmoud Abo Khamis
, Hung Q. Ngo, Reinhard Pichler, Dan Suciu, Yisu Remy Wang:
Convergence of datalog over (Pre-) Semirings. J. ACM 71(2): 8:1-8:55 (2024)- [j49]Georg Gottlob, Matthias Lanzinger, Cem Okulmus, Reinhard Pichler:
Fast Parallel Hypertree Decompositions in Logarithmic Recursion Depth. ACM Trans. Database Syst. 49(1): 1:1-1:43 (2024) - [i25]Shqiponja Ahmetaj, Timo Camillo Merkl, Reinhard Pichler:
Consistent Query Answering over SHACL Constraints. CoRR abs/2406.16653 (2024) - [i24]Matthias Lanzinger, Reinhard Pichler, Alexander Selzer:
Avoiding Materialisation for Guarded Aggregate Queries. CoRR abs/2406.17076 (2024) - [i23]Marcelo Arenas, Timo Camillo Merkl, Reinhard Pichler, Cristian Riveros:
Towards Tractability of the Diversity of Query Answers: Ultrametrics to the Rescue. CoRR abs/2408.01657 (2024) - 2023
- [j48]Renzo Angles, Georg Gottlob, Aleksandar Pavlovic, Reinhard Pichler, Emanuel Sallinger:
SparqLog: A System for Efficient Evaluation of SPARQL 1.1 Queries via Datalog. Proc. VLDB Endow. 16(13): 4240-4253 (2023) - [j47]Mahmoud Abo Khamis, Hung Q. Ngo, Reinhard Pichler, Dan Suciu, Yisu Remy Wang:
Convergence of Datalog over (Pre-) Semirings. SIGMOD Rec. 52(1): 75-82 (2023) - [j46]Georg Gottlob, Matthias Lanzinger, Reinhard Pichler, Igor Razgon:
Fractional covers of hypergraphs with bounded multi-intersection. Theor. Comput. Sci. 979: 114204 (2023) - [c108]Georg Gottlob, Matthias Lanzinger, Davide Mario Longo, Cem Okulmus, Reinhard Pichler, Alexander Selzer:
Reaching Back to Move Forward: Using Old Ideas to Achieve a New Level of Query Optimization (short paper). AMW 2023 - [c107]Timo Camillo Merkl, Reinhard Pichler, Sebastian Skritek:
Diversity of Answers to Conjunctive Queries (short paper). AMW 2023 - [c106]Lukas Grasmann, Reinhard Pichler, Alexander Selzer:
Integration of Skyline Queries into Spark SQL. EDBT 2023: 337-350 - [c105]Timo Camillo Merkl, Reinhard Pichler, Sebastian Skritek:
Diversity of Answers to Conjunctive Queries. ICDT 2023: 10:1-10:19 - [i22]Timo Camillo Merkl, Reinhard Pichler, Sebastian Skritek:
Diversity of Answers to Conjunctive Queries. CoRR abs/2301.08848 (2023) - [i21]Georg Gottlob, Matthias Lanzinger, Davide Mario Longo, Cem Okulmus, Reinhard Pichler, Alexander Selzer:
Structure-Guided Query Evaluation: Towards Bridging the Gap from Theory to Practice. CoRR abs/2303.02723 (2023) - [i20]Renzo Angles, Georg Gottlob, Aleksandar Pavlovic, Reinhard Pichler, Emanuel Sallinger:
SparqLog: A System for Efficient Evaluation of SPARQL 1.1 Queries via Datalog [Experiment, Analysis and Benchmark]. CoRR abs/2307.06119 (2023) - 2022
- [j45]Georg Gottlob, Cem Okulmus, Reinhard Pichler:
Fast and parallel decomposition of constraint satisfaction problems. Constraints An Int. J. 27(3): 284-326 (2022) - [j44]Mahmoud Abo Khamis, Hung Q. Ngo, Reinhard Pichler, Dan Suciu, Yisu Remy Wang:
Datalog in Wonderland. SIGMOD Rec. 51(2): 6-17 (2022) - [c104]Reinhard Pichler:
Novel Techniques in Datalog Optimization (Abstract). Datalog 2022: 1 - [c103]Mahmoud Abo Khamis, Hung Q. Ngo, Reinhard Pichler, Dan Suciu, Yisu Remy Wang:
Convergence of Datalog over (Pre-) Semirings. PODS 2022: 105-117 - [c102]Georg Gottlob, Matthias Lanzinger, Cem Okulmus, Reinhard Pichler:
Fast Parallel Hypertree Decompositions in Logarithmic Recursion Depth. PODS 2022: 325-336 - [c101]Yisu Remy Wang, Mahmoud Abo Khamis, Hung Q. Ngo, Reinhard Pichler, Dan Suciu:
Optimizing Recursive Queries with Progam Synthesis. SIGMOD Conference 2022: 79-93 - [i19]Yisu Remy Wang, Mahmoud Abo Khamis, Hung Q. Ngo, Reinhard Pichler, Dan Suciu:
Optimizing Recursive Queries with Program Synthesis. CoRR abs/2202.10390 (2022) - [i18]Lukas Grasmann, Reinhard Pichler, Alexander Selzer:
Integration of Skyline Queries into Spark SQL. CoRR abs/2210.03718 (2022) - 2021
- [j43]Georg Gottlob, Matthias Lanzinger, Reinhard Pichler, Igor Razgon:
Complexity Analysis of Generalized and Fractional Hypertree Decompositions. J. ACM 68(5): 38:1-38:50 (2021) - [j42]Wolfgang Fischl, Georg Gottlob, Davide Mario Longo, Reinhard Pichler:
HyperBench: A Benchmark and Tool for Hypergraphs and Empirical Findings. ACM J. Exp. Algorithmics 26: 1.6:1-1.6:40 (2021) - [j41]Reinhard Pichler:
Database Theory Column Report on PODS 2021. SIGACT News 52(3): 69-72 (2021) - [e4]Leonid Libkin, Reinhard Pichler, Paolo Guagliardo:
PODS'21: Proceedings of the 40th ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems, Virtual Event, China, June 20-25, 2021. ACM 2021, ISBN 978-1-4503-8381-3 [contents] - [i17]Georg Gottlob, Matthias Lanzinger, Cem Okulmus, Reinhard Pichler:
Fast Parallel Hypertree Decompositions in Logarithmic Recursion Depth. CoRR abs/2104.13793 (2021) - [i16]Mahmoud Abo Khamis, Hung Q. Ngo, Reinhard Pichler, Dan Suciu, Yisu Remy Wang:
Convergence of Datalog over (Pre-) Semirings. CoRR abs/2105.14435 (2021) - 2020
- [j40]Reinhard Pichler:
Technical Perspective: Efficient Logspace Classes for Enumeration, Counting, and Uniform Generation. SIGMOD Rec. 49(1): 51 (2020) - [j39]Phokion G. Kolaitis, Reinhard Pichler, Emanuel Sallinger, Vadim Savenkov:
On the Language of Nested Tuple Generating Dependencies. ACM Trans. Database Syst. 45(2): 8:1-8:59 (2020) - [c100]Georg Gottlob, Matthias Lanzinger, Davide Mario Longo, Cem Okulmus, Reinhard Pichler:
The HyperTrac Project: Recent Progress and Future Research Directions on Hypergraph Decompositions. CPAIOR 2020: 3-21 - [c99]Georg Gottlob, Cem Okulmus, Reinhard Pichler:
Fast and Parallel Decomposition of Constraint Satisfaction Problems. IJCAI 2020: 1155-1162 - [c98]Hubie Chen, Georg Gottlob, Matthias Lanzinger, Reinhard Pichler:
Semantic Width and the Fixed-Parameter Tractability of Constraint Satisfaction Problems. IJCAI 2020: 1726-1733 - [c97]Georg Gottlob, Matthias Lanzinger, Reinhard Pichler, Igor Razgon:
Fractional Covers of Hypergraphs with Bounded Multi-Intersection. MFCS 2020: 41:1-41:14 - [i15]Georg Gottlob, Matthias Lanzinger, Reinhard Pichler, Igor Razgon:
Complexity Analysis of General and Fractional Hypertree Decompositions. CoRR abs/2002.05239 (2020) - [i14]Georg Gottlob, Matthias Lanzinger, Reinhard Pichler, Igor Razgon:
Fractional Covers of Hypergraphs with Bounded Multi-Intersection. CoRR abs/2007.01830 (2020) - [i13]Hubie Chen, Georg Gottlob, Matthias Lanzinger, Reinhard Pichler:
Semantic Width and the Fixed-Parameter Tractability of Constraint Satisfaction Problems. CoRR abs/2007.14169 (2020) - [i12]Wolfgang Fischl, Georg Gottlob, Davide Mario Longo, Reinhard Pichler:
HyperBench: A Benchmark and Tool for Hypergraphs and Empirical Findings. CoRR abs/2009.01769 (2020) - [i11]Georg Gottlob, Matthias Lanzinger, Davide Mario Longo, Cem Okulmus, Reinhard Pichler:
The HyperTrac Project: Recent Progress and Future Research Directions on Hypergraph Decompositions. CoRR abs/2012.14762 (2020)
2010 – 2019
- 2019
- [j38]Nadia Creignou, Markus Kröll, Reinhard Pichler, Sebastian Skritek, Heribert Vollmer:
A complexity theory for hard enumeration problems. Discret. Appl. Math. 268: 191-209 (2019) - [c96]Wolfgang Fischl, Georg Gottlob, Davide M. Longo, Reinhard Pichler:
HyperBench: A Benchmark and Tool for Hypergraphs and Empirical Findings. AMW 2019 - [c95]Georg Gottlob, Matthias Lanzinger, Reinhard Pichler:
Semantic Width Revisited (Extended Abstract). AMW 2019 - [c94]Georg Gottlob, Cem Okulmus, Reinhard Pichler:
Parallel Computation of Generalized Hypertree Decompositions. AMW 2019 - [c93]Leopoldo E. Bertossi, Georg Gottlob, Reinhard Pichler:
Datalog: Bag Semantics via Set Semantics. ICDT 2019: 16:1-16:19 - [c92]Wolfgang Fischl, Georg Gottlob, Davide Mario Longo, Reinhard Pichler:
HyperBench: A Benchmark and Tool for Hypergraphs and Empirical Findings. PODS 2019: 464-480 - [i10]Endre Boros, Benny Kimelfeld, Reinhard Pichler, Nicole Schweikardt:
Enumeration in Data Management (Dagstuhl Seminar 19211). Dagstuhl Reports 9(5): 89-109 (2019) - 2018
- [j37]Nadia Creignou, Reinhard Pichler, Stefan Woltran:
Do Hard SAT-Related Reasoning Tasks Become Easier in the Krom Fragment? Log. Methods Comput. Sci. 14(4) (2018) - [j36]Phokion G. Kolaitis, Reinhard Pichler, Emanuel Sallinger, Vadim Savenkov:
Limits of Schema Mappings. Theory Comput. Syst. 62(4): 899-940 (2018) - [j35]Pablo Barceló, Markus Kröll, Reinhard Pichler, Sebastian Skritek:
Efficient Evaluation and Static Analysis for Well-Designed Pattern Trees with Projection. ACM Trans. Database Syst. 43(2): 8:1-8:44 (2018) - [c91]Wolfgang Fischl, Georg Gottlob, Reinhard Pichler:
General and Fractional Hypertree Decompositions: Hard and Easy Cases (extended abstract). AMW 2018 - [c90]Theresa Csar, Martin Lackner, Reinhard Pichler:
Computing the Schulze Method for Large-Scale Preference Data Sets. IJCAI 2018: 180-187 - [c89]Wolfgang Fischl, Georg Gottlob, Reinhard Pichler:
General and Fractional Hypertree Decompositions: Hard and Easy Cases. PODS 2018: 17-32 - [e3]Michael H. Böhlen, Reinhard Pichler, Norman May, Erhard Rahm, Shan-Hung Wu, Katja Hose:
Proceedings of the 21st International Conference on Extending Database Technology, EDBT 2018, Vienna, Austria, March 26-29, 2018. OpenProceedings.org 2018, ISBN 978-3-89318-078-3 [contents] - [i9]Leopoldo E. Bertossi, Georg Gottlob, Reinhard Pichler:
Datalog: Bag Semantics via Set Semantics. CoRR abs/1803.06445 (2018) - [i8]Wolfgang Fischl, Georg Gottlob, Davide M. Longo, Reinhard Pichler:
HyperBench: A Benchmark and Tool for Hypergraphs and Empirical Findings. CoRR abs/1811.08181 (2018) - [i7]Georg Gottlob, Matthias Lanzinger, Reinhard Pichler:
Semantic Width of Conjunctive Queries and Constraint Satisfaction Problems. CoRR abs/1812.04329 (2018) - 2017
- [j34]Bernhard Bliem, Reinhard Pichler, Stefan Woltran:
Implementing Courcelle's Theorem in a declarative framework for dynamic programming. J. Log. Comput. 27(4): 1067-1094 (2017) - [c88]Theresa Csar, Martin Lackner, Reinhard Pichler, Emanuel Sallinger:
Winner Determination in Huge Elections with MapReduce. AAAI 2017: 451-458 - [c87]Georg Gottlob, Reinhard Pichler, Emanuel Sallinger:
Function Symbols in Tuple-Generating Dependencies: Expressive Power and Computability. AMW 2017 - [c86]Theresa Csar, Martin Lackner, Reinhard Pichler, Emanuel Sallinger:
Computational Social Choice in the Clouds. BTW (Workshops) 2017: 163-167 - [c85]Markus Kröll, Reinhard Pichler, Stefan Woltran:
On the Complexity of Enumerating the Extensions of Abstract Argumentation Frameworks. IJCAI 2017: 1145-1152 - [c84]Nadia Creignou, Markus Kröll, Reinhard Pichler, Sebastian Skritek, Heribert Vollmer:
On the Complexity of Hard Enumeration Problems. LATA 2017: 183-195 - [i6]Nadia Creignou, Reinhard Pichler, Stefan Woltran:
Do Hard SAT-Related Reasoning Tasks Become Easier in the Krom Fragment? CoRR abs/1711.07786 (2017) - 2016
- [j33]Kathrin Conrad, Nysret Musliu, Reinhard Pichler, Hannes Werthner:
Universities and computer science in the European crisis of refugees. Commun. ACM 59(10): 31-33 (2016) - [j32]Jesús Medina, Reinhard Pichler:
Fuzzy data exchange. Fuzzy Sets Syst. 301: 129-145 (2016) - [c83]Markus Kröll, Reinhard Pichler, Sebastian Skritek:
On the Complexity of Enumerating the Answers to Well-Designed Pattern Trees. AMW 2016 - [c82]Shqiponja Ahmetaj, Wolfgang Fischl, Markus Kröll, Reinhard Pichler, Mantas Simkus, Sebastian Skritek:
The Challenge of Optional Matching in SPARQL. FoIKS 2016: 169-190 - [c81]Phokion G. Kolaitis, Reinhard Pichler, Emanuel Sallinger, Vadim Savenkov:
Limits of Schema Mappings. ICDT 2016: 19:1-19:17 - [c80]Sebastian Arming, Reinhard Pichler, Emanuel Sallinger:
Complexity of Repair Checking and Consistent Query Answering. ICDT 2016: 21:1-21:18 - [c79]Markus Kröll, Reinhard Pichler, Sebastian Skritek:
On the Complexity of Enumerating the Answers to Well-designed Pattern Trees. ICDT 2016: 22:1-22:18 - [e2]Reinhard Pichler, Altigran Soares da Silva:
Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016. CEUR Workshop Proceedings 1644, CEUR-WS.org 2016 [contents] - [i5]Nadia Creignou, Markus Kröll, Reinhard Pichler, Sebastian Skritek, Heribert Vollmer:
On the Complexity of Hard Enumeration Problems. CoRR abs/1610.05493 (2016) - [i4]Wolfgang Fischl, Georg Gottlob, Reinhard Pichler:
General and Fractional Hypertree Decompositions: Hard and Easy Cases. CoRR abs/1611.01090 (2016) - 2015
- [j31]Ingo Feinerer, Reinhard Pichler, Emanuel Sallinger, Vadim Savenkov:
On the undecidability of the equivalence of second-order tuple generating dependencies. Inf. Syst. 48: 113-129 (2015) - [j30]Andreas Pfandler, Reinhard Pichler, Stefan Woltran:
The complexity of handling minimal solutions in logic-based abduction. J. Log. Comput. 25(3): 805-825 (2015) - [c78]Shqiponja Ahmetaj, Wolfgang Fischl, Reinhard Pichler, Mantas Simkus, Sebastian Skritek:
Towards Reconciling SPARQL and Certain Answers (Extended Abstract). AMW 2015 - [c77]Pablo Barceló, Reinhard Pichler, Sebastian Skritek:
Efficient Evaluation of Well-designed Pattern Trees (Extended Abstract). AMW 2015 - [c76]Theresa Csar, Reinhard Pichler, Emanuel Sallinger, Vadim Savenkov:
Using Statistics for Computing Joins with MapReduce. AMW 2015 - [c75]Shqiponja Ahmetaj, Wolfgang Fischl, Reinhard Pichler, Mantas Simkus, Sebastian Skritek:
DL-Lite and Conjunctive Queries Extended by Optional Matching. Description Logics 2015 - [c74]Georg Gottlob, Reinhard Pichler, Emanuel Sallinger:
Function Symbols in Tuple-Generating Dependencies: Expressive Power and Computability. PODS 2015: 65-77 - [c73]Pablo Barceló, Reinhard Pichler, Sebastian Skritek:
Efficient Evaluation and Approximation of Well-designed Pattern Trees. PODS 2015: 131-144 - [c72]Shqiponja Ahmetaj, Wolfgang Fischl, Reinhard Pichler, Mantas Simkus, Sebastian Skritek:
Towards Reconciling SPARQL and Certain Answers. WWW 2015: 23-33 - 2014
- [j29]Nadia Creignou, Odile Papini, Reinhard Pichler, Stefan Woltran:
Belief revision within fragments of propositional logic. J. Comput. Syst. Sci. 80(2): 427-449 (2014) - [j28]Reinhard Pichler, Stefan Rümmele, Stefan Szeider, Stefan Woltran:
Tractable answer-set programming with weight constraints: bounded treewidth is not enough. Theory Pract. Log. Program. 14(2): 141-164 (2014) - [c71]Diego Calvanese, Wolfgang Fischl, Reinhard Pichler, Emanuel Sallinger, Mantas Simkus:
Capturing Relational Schemas and Functional Dependencies in RDFS. AAAI 2014: 1003-1011 - [c70]Martin Kronegger, Martin Lackner, Andreas Pfandler, Reinhard Pichler:
A Parameterized Complexity Analysis of Generalized CP-Nets. AAAI 2014: 1091-1097 - [c69]Sebastian Arming, Reinhard Pichler, Emanuel Sallinger:
Combined Complexity of Repair Checking and Consistent Query Answering. AMW 2014 - [c68]Reinhard Pichler, Sebastian Skritek:
On the Hardness of Counting the Solutions of SPARQL Queries. AMW 2014 - [c67]Diego Calvanese, Wolfgang Fischl, Reinhard Pichler, Emanuel Sallinger, Mantas Simkus:
Expressive Identification Constraints to Capture Functional Dependencies in Description Logics. Description Logics 2014: 416-420 - [c66]Jesús Medina, Reinhard Pichler:
A Fuzzy Extension of Data Exchange. IPMU (2) 2014: 214-223 - [c65]Reinhard Pichler, Sebastian Skritek:
Containment and equivalence of well-designed SPARQL. PODS 2014: 39-50 - [c64]Phokion G. Kolaitis, Reinhard Pichler, Emanuel Sallinger, Vadim Savenkov:
Nested dependencies: structure and reasoning. PODS 2014: 176-187 - 2013
- [j27]Reinhard Pichler, Sebastian Skritek:
Tractable counting of the answers to conjunctive queries. J. Comput. Syst. Sci. 79(6): 984-1001 (2013) - [j26]Reinhard Pichler, Emanuel Sallinger, Vadim Savenkov:
Relaxed Notions of Schema Mapping Equivalence Revisited. Theory Comput. Syst. 52(3): 483-541 (2013) - [j25]Reinhard Pichler, Axel Polleres, Sebastian Skritek, Stefan Woltran:
Complexity of redundancy detection on RDF graphs in the presence of rules, constraints, and queries. Semantic Web 4(4): 351-393 (2013) - [j24]Andrés Letelier, Jorge Pérez, Reinhard Pichler, Sebastian Skritek:
Static analysis and optimization of semantic web queries. ACM Trans. Database Syst. 38(4): 25 (2013) - [c63]Paolo Guagliardo, Reinhard Pichler, Emanuel Sallinger:
Enhancing the Updatability of Projective Views. AMW 2013 - [c62]Andreas Hubmer, Reinhard Pichler, Vadim Savenkov, Sebastian Skritek:
Efficient Updates of Uncertain Databases. AMW 2013 - [c61]Vadim Savenkov, Reinhard Pichler, Christoph Koch:
Loop Elimination for Database Updates. BNCOD 2013: 48-61 - [c60]Nadia Creignou, Reinhard Pichler, Stefan Woltran:
Do Hard SAT-Related Reasoning Tasks Become Easier in the Krom Fragment? IJCAI 2013: 824-831 - [c59]Martin Kronegger, Andreas Pfandler, Reinhard Pichler:
Parameterized Complexity of Optimal Planning: A Detailed Map. IJCAI 2013: 954-961 - [c58]Bernhard Bliem, Reinhard Pichler, Stefan Woltran:
Declarative Dynamic Programming as an Alternative Realization of Courcelle's Theorem. IPEC 2013: 28-40 - 2012
- [j23]Wolfgang Dvorák, Reinhard Pichler, Stefan Woltran:
Towards fixed-parameter tractable algorithms for abstract argumentation. Artif. Intell. 186: 1-37 (2012) - [j22]Andrés Letelier, Jorge Pérez, Reinhard Pichler, Sebastian Skritek:
SPAM: A SPARQL Analysis and Manipulation Tool. Proc. VLDB Endow. 5(12): 1958-1961 (2012) - [j21]Schahram Dustdar, Reinhard Pichler, Vadim Savenkov, Hong Linh Truong:
Quality-aware service-oriented data integration: requirements, state of the art and open challenges. SIGMOD Rec. 41(1): 11-19 (2012) - [c57]Jorge Pérez, Reinhard Pichler, Emanuel Sallinger, Vadim Savenkov:
Union and Intersection of Schema Mappings. AMW 2012: 129-141 - [c56]Martin Lackner, Reinhard Pichler, Stefan Rümmele, Stefan Woltran:
Multicut on Graphs of Bounded Clique-Width. COCOA 2012: 115-126 - [c55]Nadia Creignou, Odile Papini, Reinhard Pichler, Stefan Woltran:
Belief Revision within Fragments of Propositional Logic. KR 2012 - [c54]Michael Morak, Nysret Musliu, Reinhard Pichler, Stefan Rümmele, Stefan Woltran:
Evaluating Tree-Decomposition Based Algorithms for Answer Set Programming. LION 2012: 130-144 - [c53]Andrés Letelier, Jorge Pérez, Reinhard Pichler, Sebastian Skritek:
Static analysis and optimization of semantic web queries. PODS 2012: 89-100 - [e1]Pablo Barceló, Reinhard Pichler:
Datalog in Academia and Industry - Second International Workshop, Datalog 2.0, Vienna, Austria, September 11-13, 2012. Proceedings. Lecture Notes in Computer Science 7494, Springer 2012, ISBN 978-3-642-32924-1 [contents] - [i3]Reinhard Pichler, Stefan Rümmele, Stefan Szeider, Stefan Woltran:
Tractable Answer-Set Programming with Weight Constraints: Bounded Treewidth is not Enough. CoRR abs/1204.3040 (2012) - 2011
- [j20]Georg Gottlob, Reinhard Pichler, Vadim Savenkov:
Normalization and optimization of schema mappings. VLDB J. 20(2): 277-302 (2011) - [c52]Ingo Feinerer, Reinhard Pichler, Emanuel Sallinger, Vadim Savenkov:
On the Undecidability of the Equivalence of Second-Order Tuple Generating Dependencies. AMW 2011 - [c51]Reinhard Pichler, Sebastian Skritek:
Tractable Counting of the Answers to Conjunctive Queries. AMW 2011 - [c50]Muhammad Intizar Ali, Reinhard Pichler, Hong Linh Truong, Schahram Dustdar:
On Integrating Data Services Using Data Mashups. BNCOD 2011: 132-135 - [c49]Reinhard Pichler, Emanuel Sallinger, Vadim Savenkov:
Relaxed notions of schema mapping equivalence revisited. ICDT 2011: 90-101 - [c48]Reinhard Pichler, Sebastian Skritek:
The complexity of evaluating tuple generating dependencies. ICDT 2011: 244-255 - [c47]