142 search results - page 9 / 29 » On Conjunctive Query Answering in EL |
90
Voted
ALT
2000
Springer
15 years 4 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...
104
click to vote
PODS
2006
ACM
16 years 17 days ago
2006
ACM
Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...
105
Voted
DBISP2P
2005
Springer
15 years 2 months ago
2005
Springer
Abstract. We study the problem of evaluating RDF queries over structured overlay networks. We consider the publish/subscribe scenario where nodes subscribe with long-standing queri...
112
Voted
EUSFLAT
2009
14 years 10 months ago
2009
This paper proposes an approach aimed at obviating empty answers for a family of conjunctive queries involving Boolean or fuzzy value constraints. Contrary to the approaches based ...
111
Voted
SEBD
2007
15 years 1 months ago
2007
The use of ontologies in various application domains, such as Data Integration, the Semantic Web, or ontology-based data management, where ontologies provide the access to large am...