320 search results - page 31 / 64 » A Theory of Spatio-Temporal Database Queries |
ADBIS
1997
Springer
13 years 11 months ago
1997
Springer
A graphical formalized language is proposed for specifying systems of views over database schemas. The language is based on the notion of arrow (mapping) between data schemas and ...
ICDE
2011
IEEE
12 years 11 months ago
2011
IEEE
— Uncertain data is quite common nowadays in a variety of modern database applications. At the same time, the join operation is one of the most important but expensive operations...
ICDT
2011
ACM
12 years 11 months ago
2011
ACM
Distributed data management systems consist of peers that store, exchange and process data in order to collaboratively achieve a common goal, such as evaluate some query. We study...
PODS
2008
ACM
14 years 7 months ago
2008
ACM
We present a formal framework for capturing the provenance of data appearing in XQuery views of XML. Building on previous work on relations and their (positive) query languages, w...
ICDT
2010
ACM
13 years 11 months ago
2010
ACM
Stochastic context-free grammars (SCFGs) have long been recognized as useful for a large variety of tasks including natural language processing, morphological parsing, speech reco...