20 search results - page 2 / 4 » Conjunctive query containment and answering under descriptio... |
ICDT
2012
ACM
11 years 7 months ago
2012
ACM
A universal model of a database D and a set Σ of integrity constraints is a database that extends D, satisfies Σ, and is most general in the sense that it contains sound and co...
PODS
2000
ACM
13 years 9 months ago
2000
ACM
The problem of query containment is fundamental to many aspects of database systems, including query optimization, determining independence of queries from updates, and rewriting ...
AAAI
2007
13 years 7 months ago
2007
Expressive Description Logics (DLs) have been advocated as formalisms for modeling the domain of interest in various application areas. An important requirement is the ability to ...
ALT
2000
Springer
13 years 9 months ago
2000
Springer
A conjunctive query problem in relational database theory is a problem to determine whether or not a tuple belongs to the answer of a conjunctive query over a database. Here, a tup...
PVLDB
2010
13 years 3 months ago
2010
Ontology-based data access is a powerful form of extending database technology, where a classical extensional database (EDB) is enhanced by an ontology that generates new intensio...