281 search results - page 19 / 57 » Querying the Guarded Fragment |
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XIMEP
2006
ACM
15 years 4 months ago
2006
ACM
We discuss query evaluation for XML-based server systems where the same query is evaluated on every incoming XML message. In a typical scenario, many of the incoming messages will...
VLDB
1994
ACM
15 years 2 months ago
1994
ACM
This paper introduces a new data structure, called V-trees, designed to store long sequences of points in 2D space and yet allow efficient access to their fragments. They also opt...
TKDE
2011
14 years 1 months ago
2011
Given a positive value r, a distance based range query returns the objects that lie within the distance r of the query location.
In this paper, we focus on the distance based rang...
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ESWS
2008
Springer
14 years 12 months ago
2008
Springer
The goal of this paper is to give an overview of the basics of the theory of RDF databases. We provide a formal definition of RDF that includes the features that distinguish this m...
SAC
2008
ACM
14 years 9 months ago
2008
ACM
We address aggregate queries over GIS data and moving object data, where non-spatial information is stored in a data warehouse. We propose a formal data model and query language t...