On the complexity of bounded-variable queries (extended abstract)
PODS '95 Proceedings of the fourteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
The expressive power of stratified logic programs with value invention
Information and Computation
Testing implications of data dependencies
ACM Transactions on Database Systems (TODS)
Foundations of Databases: The Logical Level
Foundations of Databases: The Logical Level
Visual Web Information Extraction with Lixto
Proceedings of the 27th International Conference on Very Large Data Bases
The Implication Problem for Data Dependencies
Proceedings of the 8th Colloquium on Automata, Languages and Programming
On the decidability and complexity of query answering over inconsistent and incomplete databases
Proceedings of the twenty-second ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
On the complexity of single-rule datalog queries
Information and Computation - Special issue: ICC '99
The complexity of relational query languages (Extended Abstract)
STOC '82 Proceedings of the fourteenth annual ACM symposium on Theory of computing
Optimal implementation of conjunctive queries in relational data bases
STOC '77 Proceedings of the ninth annual ACM symposium on Theory of computing
Monadic datalog and the expressive power of languages for Web information extraction
Journal of the ACM (JACM)
A classification and constraint-based framework for configuration
Artificial Intelligence for Engineering Design, Analysis and Manufacturing
Data exchange: semantics and query answering
Theoretical Computer Science - Database theory
Tractable Reasoning and Efficient Query Answering in Description Logics: The DL-Lite Family
Journal of Automated Reasoning
A comparison of two modelling paradigms in the Semantic Web
Web Semantics: Science, Services and Agents on the World Wide Web
Proceedings of the twenty-seventh ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Generalized schema-mappings: from termination to tractability
Proceedings of the twenty-eighth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
A general datalog-based framework for tractable query answering over ontologies
Proceedings of the twenty-eighth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
The complexity of finite model reasoning in description logics
Information and Computation - Special issue: 19th international conference on automated deduction (CADE-19)
Logical foundations of (e)RDF(S): complexity and reasoning
ISWC'07/ASWC'07 Proceedings of the 6th international The semantic web and 2nd Asian conference on Asian semantic web conference
Finite model reasoning in DL-lite
ESWC'08 Proceedings of the 5th European semantic web conference on The semantic web: research and applications
Journal on data semantics X
LICS '10 Proceedings of the 2010 25th Annual IEEE Symposium on Logic in Computer Science
Advanced processing for ontological queries
Proceedings of the VLDB Endowment
Journal of Computer and System Sciences
On rules with existential variables: Walking the decidability line
Artificial Intelligence
CodeQuest: scalable source code queries with datalog
ECOOP'06 Proceedings of the 20th European conference on Object-Oriented Programming
Towards scalable data integration under constraints
Proceedings of the 2012 Joint EDBT/ICDT Workshops
Query rewriting using datalog for duplicate resolution
Datalog 2.0'12 Proceedings of the Second international conference on Datalog in Academia and Industry
Scalable containment for unions of conjunctive queries under constraints
Proceedings of the Fifth Workshop on Semantic Web Information Management
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In ontology-enhanced database systems, an ontology on top of the extensional database expresses intensional knowledge that enhances the database schema. Queries posed to such systems are to be evaluated considering all the knowledge inferred from the data by means of the ontology; in other words, queries are to be evaluated against the logical theory constituted by the data and the ontology. In this context, tractability of query answering is a central issue, given that the data size is normally very large. This paper surveys results on a recently introduced family of Datalog-based languages, called Datalog+/-, which is a useful logical toolbox for ontology modeling and for ontology-based query answering. We present different Datalog+/- languages and related complexity results, showing that Datalog+/- can be successfully adopted due to its clarity, expressiveness and its good computational properties.