Languages that capture complexity classes
SIAM Journal on Computing
Principles of database and knowledge-base systems, Vol. I
Principles of database and knowledge-base systems, Vol. I
The alternating fixpoint of logic programs with negation
PODS '89 Proceedings of the eighth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Abductive inference models for diagnostic problem-solving
Abductive inference models for diagnostic problem-solving
General logical databases and programs: default logic semantics and stratification
Information and Computation
Negation by default and unstratifiable logic programs
Selected papers of the workshop on Deductive database theory
SIAM Journal on Computing
Journal of Computer and System Sciences
A catalog of complexity classes
Handbook of theoretical computer science (vol. A)
Elements of relational database theory
Handbook of theoretical computer science (vol. B)
Journal of the ACM (JACM)
The well-founded semantics for general logic programs
Journal of the ACM (JACM)
Hard problems for simple default logics
Artificial Intelligence - Special issue on knowledge representation
Expressive power of query languages
Theoretical studies in computer science
Complexity aspects of various semantics for disjunctive databases
PODS '93 Proceedings of the twelfth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Relating disjunctive logic programs to default theories
Proceedings of the second international workshop on Logic programming and non-monotonic reasoning
Adding disjunction to datalog (extended abstract)
PODS '94 Proceedings of the thirteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
The complexity of propositional closed world reasoning and circumscription
Journal of Computer and System Sciences
The complexity of logic-based abduction
Journal of the ACM (JACM)
The expressive powers of stable models for bound and unbound DATALOG queries
Journal of Computer and System Sciences - special issue on complexity theory
The expressive powers of the logic programming semantics (extended abstract)
PODS '90 Proceedings of the ninth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Stable models and non-determinism in logic programs with negation
PODS '90 Proceedings of the ninth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Proceedings of the seventh ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Nonmonotonic Logic: Context-Dependent Reasoning
Nonmonotonic Logic: Context-Dependent Reasoning
Foundations of Databases: The Logical Level
Foundations of Databases: The Logical Level
Universality of data retrieval languages
POPL '79 Proceedings of the 6th ACM SIGACT-SIGPLAN symposium on Principles of programming languages
ACM Transactions on Database Systems (TODS)
Declarative problem-solving using the DLV system
Logic-based artificial intelligence
Logic programming and knowledge representation-the A-prolog perspective
Artificial Intelligence
Binding Propagation Techniques for the Optimization of Bound Disjunctive Queries
IEEE Transactions on Knowledge and Data Engineering
Multiagent Compromises, Joint Fixpoints, and Stable Models
Computational Logic: Logic Programming and Beyond, Essays in Honour of Robert A. Kowalski, Part I
Representing Knowledge in A-Prolog
Computational Logic: Logic Programming and Beyond, Essays in Honour of Robert A. Kowalski, Part II
Minimal Founded Semantics for Disjunctive Logic Programming
LPNMR '99 Proceedings of the 5th International Conference on Logic Programming and Nonmonotonic Reasoning
On the Expressibility of Stable Logic Programming
LPNMR '01 Proceedings of the 6th International Conference on Logic Programming and Nonmonotonic Reasoning
Optimizing the Computation of Heuristics for Answer Set Programming Systems
LPNMR '01 Proceedings of the 6th International Conference on Logic Programming and Nonmonotonic Reasoning
LPNMR '01 Proceedings of the 6th International Conference on Logic Programming and Nonmonotonic Reasoning
A Logical Framework for Querying and Repairing Inconsistent Databases
IEEE Transactions on Knowledge and Data Engineering
Enhancing disjunctive logic programming systems by SAT checkers
Artificial Intelligence
On the expressibility of stable logic programming
Theory and Practice of Logic Programming
Abductive logic programs with penalization: semantics, complexity and implementation
Theory and Practice of Logic Programming
Theory and Practice of Logic Programming
The DLV system for knowledge representation and reasoning
ACM Transactions on Computational Logic (TOCL)
Quantitative Disjunctive Logic Programming: semantics and computation
AI Communications
On look-ahead heuristics in disjunctive logic programming
Annals of Mathematics and Artificial Intelligence
Enhancing DLV instantiator by backjumping techniques
Annals of Mathematics and Artificial Intelligence
Redundancy in logic III: Non-monotonic reasoning
Artificial Intelligence
Outlier detection using default reasoning
Artificial Intelligence
The DLV Project: A Tour from Theory and Research to Applications and Market
ICLP '08 Proceedings of the 24th International Conference on Logic Programming
Stable model checking made easy
IJCAI'99 Proceedings of the 16th international joint conference on Artifical intelligence - Volume 1
QCSP made practical by virtue of restricted quantification
IJCAI'07 Proceedings of the 20th international joint conference on Artifical intelligence
Experimenting with heuristics for answer set programming
IJCAI'01 Proceedings of the 17th international joint conference on Artificial intelligence - Volume 1
Complexity of default logic on generalized conjunctive queries
LPNMR'07 Proceedings of the 9th international conference on Logic programming and nonmonotonic reasoning
The third answer set programming competition: preliminary report of the system competition track
LPNMR'11 Proceedings of the 11th international conference on Logic programming and nonmonotonic reasoning
Solving hard ASP programs efficiently
LPNMR'05 Proceedings of the 8th international conference on Logic Programming and Nonmonotonic Reasoning
The relationship between reasoning about privacy and default logics
LPAR'05 Proceedings of the 12th international conference on Logic for Programming, Artificial Intelligence, and Reasoning
Magic Sets for disjunctive Datalog programs
Artificial Intelligence
Privacy preservation using multi-context systems and default logic
Correct Reasoning
RW'13 Proceedings of the 9th international conference on Reasoning Web: semantic technologies for intelligent data access
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Research in nonmonotonic reasoning has focused largely on the idea of representing knowledge about the world via rules that are generally true but can be defeated. Even if relational databases are nowadays the main tool for storing very large sets of data, the approach of using nonmonotonic AI formalisms as relational database query languages has been investigated to a much smaller extent. In this work, we propose a novel application of Reiter's default logic by introducing a default query language (DQL) for finite relational databases, which is based on default rules. The main result of this paper is that DQL is as expressive as SO驴驴, the existential-universal fragment of second-order logic. This result is not only of theoretical importance: We exhibit queries驴which are useful in practice驴that can be expressed with DQL and cannot with other query languages based on nonmonotonic logics such as DATALOG with negation under the stable model semantics. In particular, we show that DQL is well-suited for diagnostic reasoning.