209 search results - page 4 / 42 » Using Ontologies for Database Query Reformulation |
EDBT
2012
ACM
11 years 8 months ago
2012
ACM
In this paper we consider the problem of answering queries using views, with or without ontological constraints, which is important for data integration, query optimization, and d...
ADBIS
2007
Springer
14 years 7 days ago
2007
Springer
Nowadays, ontologies are used in a lot of diverse research fields. They provide with the capability to describe a huge set of information contents. Therefore, several approaches f...
DEXAW
2004
IEEE
13 years 9 months ago
2004
IEEE
The Web is moving to a new generation in which machine-understandable processing is mandatory. In order to achieve this goal it is essential to define ontologies which enable the ...
SSDBM
2002
IEEE
13 years 11 months ago
2002
IEEE
This paper presents an approach to answering queries over an ontology modelled using a description logic. The ontology acts as a global schema, providing a declarative description...
DILS
2006
Springer
13 years 9 months ago
2006
Springer
The Open Biomedical Ontologies (OBO) is a consortium that serves as a repository of ontologies that are structured like directed acyclic graphs. In this paper we present a language...