429 search results - page 62 / 86 » A SAT approach to query optimization in mediator systems |
CIKM
2011
Springer
12 years 8 months ago
2011
Springer
A fundamental problem related to RDF query processing is selectivity estimation, which is crucial to query optimization for determining a join order of RDF triple patterns. In thi...
GIS
2005
ACM
14 years 9 months ago
2005
ACM
Several application contexts require the ability to use together and compare different geographic datasets (maps) concerning the same or overlapping areas. This is for example the...
FGCS
2007
13 years 8 months ago
2007
Abstract. E-Science Semantic Grids can often be thought of as dynamic collection of semantic subgrids where each subgrid is a collection of modest number of services that assembled...
ICDE
1994
IEEE
14 years 26 days ago
1994
IEEE
We describe the design of Mariposa, an experimental distributed data management system that provides high performance in an environment of high data mobility and heterogeneous hos...
SIGMOD
2004
ACM
14 years 8 months ago
2004
ACM
Spatial Database Management Systems (SDBMS), e.g., Geographical Information Systems, that manage spatial objects such as points, lines, and hyper-rectangles, often have very high ...