54 search results - page 9 / 11 » Logical Foundations of Multilevel Databases |
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
We perform a theoretical study of the following queryview security problem: given a view V to be published, does V logically disclose information about a confidential query S? The...
PODS
2007
ACM
14 years 7 months ago
2007
ACM
In [3], we introduced a framework for querying and updating probabilistic information over unordered labeled trees, the probabilistic tree model. The data model is based on trees ...
HICSS
2005
IEEE
14 years 1 months ago
2005
IEEE
In this paper, we consider existing approaches to ontology definition and validation. Popular techniques include the use of domain experts or reliance on formal logic. We consider...
VLDB
2001
ACM
14 years 23 min ago
2001
ACM
: We present a change-centric method to manage versions in a Web WareHouse of XML data. The starting points is a sequence of snapshots of XML documents we obtain from the web. By r...
CIDR
2009
13 years 8 months ago
2009
The traditional architecture for a DBMS engine has the recovery, concurrency control and access method code tightly bound together in a storage engine for records. We propose a di...