Decidability and expressiveness aspects of logic queries
PODS '87 Proceedings of the sixth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Foundations of logic programming; (2nd extended ed.)
Foundations of logic programming; (2nd extended ed.)
Principles of database and knowledge-base systems, Vol. I
Principles of database and knowledge-base systems, Vol. I
Towards a theory of declarative knowledge
Foundations of deductive databases and logic programming
Proof-tree transformation theorems and their applications
PODS '89 Proceedings of the eighth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Logic programs with classical negation
Logic programming
Logic programs with exceptions
Logic programming
Proceedings of the 1990 North American conference on Logic programming
Adding disjunction to datalog (extended abstract)
PODS '94 Proceedings of the thirteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Answering queries using views (extended abstract)
PODS '95 Proceedings of the fourteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Answering queries using limited external query processors (extended abstract)
PODS '96 Proceedings of the fifteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Rewriting queries using views in description logics
PODS '97 Proceedings of the sixteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Answering recursive queries using views
PODS '97 Proceedings of the sixteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
On the complexity of the containment problem for conjunctive queries with built-in predicates
PODS '98 Proceedings of the seventeenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Complexity of answering queries using materialized views
PODS '98 Proceedings of the seventeenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Foundations of Databases: The Logical Level
Foundations of Databases: The Logical Level
Testing containment of conjunctive queries under functional and inclusion dependencies
PODS '82 Proceedings of the 1st ACM SIGACT-SIGMOD symposium on Principles of database systems
Optimizing Queries with Materialized Views
ICDE '95 Proceedings of the Eleventh International Conference on Data Engineering
ICDE '96 Proceedings of the Twelfth International Conference on Data Engineering
Information Integration Using Logical Views
ICDT '97 Proceedings of the 6th International Conference on Database Theory
Conjunctive Query Containment Revisited
ICDT '97 Proceedings of the 6th International Conference on Database Theory
Query planning and optimization in information integration
Query planning and optimization in information integration
Containment of Conjunctive Queries with Safe Negation
ICDT '03 Proceedings of the 9th International Conference on Database Theory
On the containment of conjunctive queries
Computer Science in Perspective
A logic-based approach to data integration
Theory and Practice of Logic Programming
Bucket-Based Query Rewriting with Disjunctive Data Source
WI '04 Proceedings of the 2004 IEEE/WIC/ACM International Conference on Web Intelligence
Rewriting queries using views with negation
AI Communications
Efficient approaches for materialized views selection in a data warehouse
Information Sciences: an International Journal
View-based query processing: On the relationship between rewriting, answering and losslessness
Theoretical Computer Science
Bounded regular path queries in view-based data integration
Information Processing Letters
Certain answers for views and queries expressed as non-recursive datalog programs with negation
ACIIDS'11 Proceedings of the Third international conference on Intelligent information and database systems - Volume Part I
View-based query answering in Description Logics: Semantics and complexity
Journal of Computer and System Sciences
View-based query processing: on the relationship between rewriting, answering and losslessness
ICDT'05 Proceedings of the 10th international conference on Database Theory
Consistent query answers in virtual data integration systems
Inconsistency Tolerance
Answering queries using views in the presence of functional dependencies
BNCOD'05 Proceedings of the 22nd British National conference on Databases: enterprise, Skills and Innovation
Efficient processing of twig query with compound predicates in fuzzy XML
Fuzzy Sets and Systems
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In this paper, we consider the problem of answering queries using materialized views in the presence of negative goals. The solution is carried out by 驴inverting驴 views and deriving both positive and negative knowledge. In order to derive negative knowledge, we invert conjunctive views with negation into a set of (extended) views which may also have, in addition to negation-as-failure, a different form of negation called classical (or strong) negation. We also consider the case of disjunctive views and present a technique which permits us to infer both positive and negative knowledge. Furthermore, we extend previous techniques for inferring knowledge from views based on relations with functional dependencies. Finally, we present a prototype of a system developed at the University of Calabria.