412 search results - page 1 / 83 » Aggregate queries over ontologies |
CIKM
2008
Springer
13 years 6 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...
FQAS
2009
Springer
13 years 11 months ago
2009
Springer
Abstract. Controlled languages (CLs) are ambiguity-free subsets of natural languages such as English offering a good trade-off between the formal rigor of ontology and query langua...
TKDE
2012
11 years 6 months ago
2012
—Continuous queries are used to monitor changes to time varying data and to provide results useful for online decision making. Typically a user desires to obtain the value of som...
ICDE
2004
IEEE
14 years 5 months ago
2004
IEEE
SMC
2010
IEEE
13 years 2 months ago
2010
IEEE
—We outline SoftFacts, an ontology mediated top-k information retrieval system over relational databases. An ontology layer is used to define (in terms of a OWL-QL like Semantic...