1179 search results - page 146 / 236 » Query Containment for Data Integration Systems |
CAISE
2005
Springer
14 years 2 months ago
2005
Springer
Abstract. Recently, the database and AI research communities have paid increased attention to ontologies. The main motivating reason is that ontologies promise solutions for comple...
IWMMDBMS
1998
13 years 10 months ago
1998
Most applications that access large data objects do so through file systems, but file systems provide an incomplete solution, as they maintain insufficient metadata and do not pro...
CIKM
2000
Springer
14 years 12 days ago
2000
Springer
Geographic Information Systems (GISs) have become an essential tool for efficient handling of our natural and artificial environment. The most important activities in a GIS are qu...
CLEANDB
2006
ACM
13 years 10 months ago
2006
ACM
An important reality when integrating scientific data is the fact that data may often be "missing", partially specified, or conflicting. Therefore, in this paper, we pre...
SIGMOD
2007
ACM
14 years 9 months ago
2007
ACM
Accurate cardinality estimation is critically important to high-quality query optimization. It is well known that conventional cardinality estimation based on histograms or simila...