33 search results - page 1 / 7 » First-order complete and computationally complete query lang... |
DBPL
2001
Springer
13 years 12 months ago
2001
Springer
Abstract. We address a fundamental question concerning spatio-temporal database systems: “What are exactly spatio-temporal queries?” We define spatio-temporal queries to be co...
TOCL
2008
13 years 7 months ago
2008
ICDT
2009
ACM
14 years 8 months ago
2009
ACM
Marx and de Rijke have shown that the navigational core of the w3c XML query language XPath is not first-order complete ? that is it cannot express every query definable in firsto...
ICDT
2007
ACM
14 years 1 months ago
2007
ACM
Moving objects produce trajectories. We describe a data model for trajectories and trajectory samples and an efficient way of modeling uncertainty via beads for trajectory samples....
PODS
2009
ACM
14 years 7 months ago
2009
ACM
The paper investigates the question of whether a partially closed database has complete information to answer a query. In practice an enterprise often maintains master data Dm, a ...