7593 search results - page 452 / 1519 » Querying XML Databases |
197
click to vote
PODS
2000
ACM
15 years 11 months ago
2000
ACM
The problem of query containment is fundamental to many aspects of database systems, including query optimization, determining independence of queries from updates, and rewriting ...
170
click to vote
PODS
2007
ACM
16 years 7 months ago
2007
ACM
Variables are the distinguishing new feature of XPath 2.0 which permits to select n-tuples of nodes in trees. It is known that the Core of XPath 2.0 captures n-ary first-order (FO...
167
Voted
VLDB
2005
ACM
16 years 9 days ago
2005
ACM
We extend the OLAP data model to represent data ambiguity, specifically imprecision and uncertainty, and introduce an allocation-based approach to the semantics of aggregation qu...
170
click to vote
VLDB
2004
ACM
16 years 5 days ago
2004
ACM
PIVOT and UNPIVOT, two operators on tabular data that exchange rows and columns, enable data transformations useful in data modeling, data analysis, and data presentation. They ca...
315
click to vote
ICDE
2009
IEEE
16 years 8 months ago
2009
IEEE
Abstract-- In sensor environments and moving robot applications, the position of an object is often known imprecisely because of measurement error and/or movement of the object. In...