2845 search results - page 5 / 569 » Constraints over Ontologies |
COMAD
2009
13 years 10 months ago
2009
An ontology is an explicit specification of shared conceptualization. The Web Ontology Language (OWL) is a family of knowledge representation languages for authoring ontologies, a...
CIKM
2008
Springer
13 years 10 months ago
2008
Springer
Answering queries over ontologies is an important issue for the Semantic Web. Aggregate queries were widely studied for relational databases but almost no results are known for ag...
KSEM
2010
Springer
13 years 7 months ago
2010
Springer
In this paper, we consider the problem of query answering over large multimedia ontologies. Traditional reasoning systems may have problems to deal with large amounts of expressive...
JAR
2010
13 years 3 months ago
2010
The development of ontologies involves continuous but relatively small modifications. However, existing ontology reasoners do not take advantage of the similarities between differe...
NORMAS
2005
Springer
14 years 2 months ago
2005
Springer
In order to regulate different circumstances over an extensive period of time, norms in institutions are stated in a vague and biguous manner, thereby abstracting from concrete as...