617 search results - page 46 / 124 » Semantic queries in databases: problems and challenges |
ICDE
2007
IEEE
14 years 10 months ago
2007
IEEE
Estimating the selectivity of queries is a crucial problem in database systems. Virtually all database systems rely on the use of selectivity estimates to choose amongst the many ...
KDD
2004
ACM
14 years 2 months ago
2004
ACM
Semantic understanding of multimedia content is critical in enabling effective access to all forms of digital media data. By making large media repositories searchable, semantic ...
SSD
2007
Springer
14 years 3 months ago
2007
Springer
We address continuously processing an aggregation join query over data streams. Queries of this type involve both join and aggregation operations, with windows specified on join ...
ER
2006
Springer
14 years 18 days ago
2006
Springer
Ontologies on the Semantic Web are by nature decentralized. From the body of ontology mapping approaches, we can draw a conclusion that an effective approach to automate ontology m...
KDD
2005
ACM
14 years 9 months ago
2005
ACM
The Web has been rapidly "deepened" by myriad searchable databases online, where data are hidden behind query interfaces. As an essential task toward integrating these m...