[BOOK][B] Database management systems
R Ramakrishnan, J Gehrke - 2002 - dl.acm.org
Database Management Systems provides comprehensive and up-to-date coverage of the
fundamentals of database systems. Coherent explanations and practical examples have …
fundamentals of database systems. Coherent explanations and practical examples have …
Ontop: Answering SPARQL queries over relational databases
We present Ontop, an open-source Ontology-Based Data Access (OBDA) system that allows
for querying relational data sources through a conceptual representation of the domain of …
for querying relational data sources through a conceptual representation of the domain of …
[PDF][PDF] Consistent query answers in inconsistent databases
In this paper we consider the problem of the logical characterization of the notion of
consistent answer in a relational database that may violate given integrity constraints. This …
consistent answer in a relational database that may violate given integrity constraints. This …
An overview of cooperative answering
T Gaasterland, P Godfrey, J Minker - Journal of Intelligent Information …, 1992 - Springer
Databases and information systems are often hard to use because they do not explicitly
attempt to cooperate with their users. Direct answers to database and knowledge base …
attempt to cooperate with their users. Direct answers to database and knowledge base …
The virtual knowledge graph system ontop
G ** partitions
Abstract Knowledge graphs are often constructed from heterogeneous data sources, using
declarative rules that map them to a target ontology and materializing them into RDF. When …
declarative rules that map them to a target ontology and materializing them into RDF. When …