239 search results - page 42 / 48 » Complete Geometrical Query Languages |
CI
2000
13 years 7 months ago
2000
Kowalski and Sergot's Event Calculus (EC) is a simple temporal formalism that, given a set of event occurrences, derives the maximal validity intervals (MVIs) over which prop...
VLDB
1989
ACM
13 years 11 months ago
1989
ACM
In this paper. we utilize intervals for unknown values in incompleterelational databases.We usetablesto representunknown relations. First, we define three partial tuple types in a...
SSD
2001
Springer
13 years 11 months ago
2001
Springer
Recently there is much interest in moving objects databases, and data models and query languages have been proposed offering data types such as moving point and moving region toge...
VLDB
1998
ACM
13 years 7 months ago
1998
ACM
The increasing power of modern computers steadily opens up new application domains for advanced data processing such as engineering and knowledge-based applications. To meet their...
ICCS
2009
Springer
14 years 1 months ago
2009
Springer
Abstract. In knowledge bases, the open world assumption and the ability to express variables may lead to an answer redundancy problem. This problem occurs when the returned answers...