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+/- lan...
We survey a recently introduced family of expressive extensions of Datalog, called Datalog±, which i...
Ontology-based data access is a powerful form of extending database technology, where a classical ex...
Ontology-based data access is a powerful form of extending database technology, where a classical ex...
In ontology-enhanced database systems, an ontology on top of the extensional database expresses inte...
In ontology-based data access, an extensional database is enhanced by an ontology that generates new...
In ontology-based data access, an extensional database is enhanced by an ontology that generates new...
In ontology-based data access, an extensional database is enhanced by an ontology that generates new...
This paper summarizes results on a recently introduced family of Datalog-based languages, called Dat...
In this tutorial we address the problem of ontology querying, that is, the problem of answering quer...
Ontologies and rules play a central role in the development of the Semantic Web. Recent research in ...
Ontologies and rules play a central role in the development of the Semantic Web. Recent research in ...
Ontologies and rules play a central role in the development of the Semantic Web. Recent research in ...
In this paper, we introduce a family of expressive extensions of Datalog, called Datalog+/-, as a ne...
Ontologies and rules play a central role in the development of the Semantic Web. Recent research in ...
Ontologies and rules play a central role in the development of the Semantic Web. Recent research in ...
We survey a recently introduced family of expressive extensions of Datalog, called Datalog±, which i...
Ontology-based data access is a powerful form of extending database technology, where a classical ex...
Ontology-based data access is a powerful form of extending database technology, where a classical ex...
In ontology-enhanced database systems, an ontology on top of the extensional database expresses inte...
In ontology-based data access, an extensional database is enhanced by an ontology that generates new...
In ontology-based data access, an extensional database is enhanced by an ontology that generates new...
In ontology-based data access, an extensional database is enhanced by an ontology that generates new...
This paper summarizes results on a recently introduced family of Datalog-based languages, called Dat...
In this tutorial we address the problem of ontology querying, that is, the problem of answering quer...
Ontologies and rules play a central role in the development of the Semantic Web. Recent research in ...
Ontologies and rules play a central role in the development of the Semantic Web. Recent research in ...
Ontologies and rules play a central role in the development of the Semantic Web. Recent research in ...
In this paper, we introduce a family of expressive extensions of Datalog, called Datalog+/-, as a ne...
Ontologies and rules play a central role in the development of the Semantic Web. Recent research in ...
Ontologies and rules play a central role in the development of the Semantic Web. Recent research in ...
We survey a recently introduced family of expressive extensions of Datalog, called Datalog±, which i...
Ontology-based data access is a powerful form of extending database technology, where a classical ex...
Ontology-based data access is a powerful form of extending database technology, where a classical ex...
Add to ORKG