550 search results - page 30 / 110 » An Expressive Language for Linear Spatial Database Queries |
GIS
2006
ACM
14 years 9 months ago
2006
ACM
Geography Markup Language (GML) is an XML-based language for the markup, storage, and exchange of geospatial data. It provides a rich geospatial vocabulary and allows flexible doc...
ICDE
2004
IEEE
14 years 10 months ago
2004
IEEE
We present algebraic equivalences that allow to unnest nested algebraic expressions for order-preserving algebraic operators. We illustrate how these equivalences can be applied s...
VISUAL
1999
Springer
14 years 29 days ago
1999
Springer
To support the retrieval and fusion of multimedia information from multiple sources and databases, a spatial/temporal query language called ΣQL is proposed. ΣQL is based upon th...
ICDE
1994
IEEE
14 years 26 days ago
1994
IEEE
In applications like nancial trading, scheduling, manufacturing and process control, time based predicates in queries and rules are very important. There is also a need to de ne ...
DBPL
2005
Springer
13 years 10 months ago
2005
Springer
XQuery is known to be a powerful XML query language with many bells and whistles. For many common queries we do not need all the expressive power of XQuery. We investigate the eff...