2043 search results - page 225 / 409 » The Limits of Querying Ontologies |
DEXA
2007
Springer
14 years 1 months ago
2007
Springer
The two dominant costs in continuous spatial query systems are the wireless communication cost for location update, and the evaluation cost for query processing. Existing works add...
INTR
2010
13 years 7 months ago
2010
Purpose – Web search engines are frequently used by people to locate information on the Internet. However, not all queries have an informational goal. Instead of information, so...
VLDB
2007
ACM
14 years 9 months ago
2007
ACM
Incompleteness due to missing attribute values (aka "null values") is very common in autonomous web databases, on which user accesses are usually supported through media...
SIGMOD
2004
ACM
14 years 9 months ago
2004
ACM
The rapid adoption of XML as the standard for data representation and exchange foreshadows a massive increase in the amounts of XML data collected, maintained, and queried over th...
SIGMOD
2009
ACM
14 years 4 months ago
2009
ACM
The state of the art commercial query optimizers employ cost-based optimization and exploit dynamic programming (DP) to find the optimal query execution plan (QEP) without evalua...