52 search results - page 2 / 11 » Towards a Theory of Spatial Database Queries |
SIGMOD
2002
ACM
14 years 5 months ago
2002
ACM
Time-parameterized queries (TP queries for short) retrieve (i) the actual result at the time that the query is issued, (ii) the validity period of the result given the current mot...
IUI
2003
ACM
13 years 10 months ago
2003
ACM
The need for Natural Language Interfaces to databases (NLIs) has become increasingly acute as more and more people access information through their web browsers, PDAs, and cell ph...
SSD
1995
Springer
13 years 9 months ago
1995
Springer
We present a data structure used to represent planar spatial databases in the topological data model. Conceptually, such databases consist of points, lines between these points, an...
DNIS
2010
Springer
14 years 5 days ago
2010
Springer
The class of k Nearest Neighbor (kNN) queries in spatial networks is extensively studied in the context of numerous applications. In this paper, for the first time we study a gene...
ICDT
2009
ACM
14 years 6 months ago
2009
ACM
The need to manage diverse information sources has triggered the rise of very loosely structured data models, known as "dataspace models." Such information management sy...