412 search results - page 42 / 83 » Aggregate queries over ontologies |
OTM
2009
Springer
14 years 4 months ago
2009
Springer
Provenance, from the French word “provenir”, describes the lineage or history of a data entity. Provenance is critical information in scientific applications to verify experime...
GEOS
2005
Springer
14 years 3 months ago
2005
Springer
This paper analyses reported difficulties in spatial data retrieval from Internet portals, based on results from an empirical survey. The analysis reveals the problems which cause ...
ICDE
2010
IEEE
13 years 8 months ago
2010
IEEE
Abstract-- Classification hierarchies are trees where links codify the fact that a node lower in the hierarchy contains documents whose contents are more specific than those one le...
SIGMOD
2008
ACM
14 years 10 months ago
2008
ACM
Today's enterprise databases are large and complex, often relating hundreds of entities. Enabling ordinary users to query such databases and derive value from them has been o...
ER
2009
Springer
14 years 1 months ago
2009
Springer
Ontologies have been extensively used to model domain-specific knowledge. Recent research has applied ontologies to enhance the discovery and retrieval of geographic data in Spatia...