617 search results - page 97 / 124 » Semantic queries in databases: problems and challenges |
GIS
2007
ACM
14 years 10 months ago
2007
ACM
Accurate and efficient integration of geospatial data is an important problem with applications in areas such as emergency response and urban planning. Some of the key challenges ...
SIGMOD
2007
ACM
14 years 9 months ago
2007
ACM
An important problem for many location-based applications is the continuous evaluation of proximity relations among moving objects. These relations express whether a given set of ...
VLDB
2004
ACM
14 years 2 months ago
2004
ACM
Data Cleaning is an important process that has been at the center of research interest in recent years. An important end goal of effective data cleaning is to identify the relatio...
ITNG
2008
IEEE
14 years 3 months ago
2008
IEEE
With recent advances in wireless communication and position technologies, it became possible to collect and record trajectories of moving objects. Thus, many services in road netw...
DNIS
2010
Springer
14 years 3 days ago
2010
Springer
Access control for relational databases is a well researched area. An SQL query is allowed or denied access to database according to the specified access control policy. On the oth...