274 search results - page 26 / 55 » Computational complexity of queries based on itemsets |
132
Voted
CSFW
2008
IEEE
15 years 10 months ago
2008
IEEE
DKAL is a new declarative authorization language for distributed systems. It is based on existential fixed-point logic and is considerably more expressive than existing authoriza...
209
Voted
VLDB
2002
ACM
16 years 3 months ago
2002
ACM
We propose a new data structure to search in metric spaces. A metric space is formed by a collection of objects and a distance function de ned among them, which satis es the trian...
121
Voted
CIKM
1999
Springer
15 years 8 months ago
1999
Springer
On-line analytical processing (OLAP) requires e cient processing of complex decision support queries over very large databases. It is well accepted that pre-computed data cubes ca...
162
Voted
DEXA
2005
Springer
15 years 9 months ago
2005
Springer
In this paper we introduce a novel architecture for data processing, based on a functional fusion between a data and a computation layer. We show how such an architecture can be le...
166
Voted
JACM
2008
15 years 3 months ago
2008
XML queries are usually expressed by means of XPath expressions identifying portions of the selected documents. An XPath expression defines a way of navigating an XML tree and ret...