427 search results - page 28 / 86 » Conjunctive Query Answering in EL using a Database System |
EDBT
2012
ACM
11 years 11 months ago
2012
ACM
In this paper we consider the problem of answering queries using views, with or without ontological constraints, which is important for data integration, query optimization, and d...
ISI
2006
Springer
13 years 8 months ago
2006
Springer
Access control mechanisms are commonly used to provide control over who may access sensitive information. However, malicious users can exploit the correlation among the data and in...
VLDB
1990
ACM
14 years 22 days ago
1990
ACM
A probabilistic learning model for vague queries and missing or imprecise information in databases is described. Instead of retrieving only a set of answers, our approach yields a...
W3C
1998
13 years 10 months ago
1998
This paper discusses the use of XML in conjunction with a variety of repositories and database systems, and outlines some of the requirements for an effective query language. Many...
SIGMOD
2006
ACM
14 years 8 months ago
2006
ACM
The continuous sliding-window query model is used widely in data stream management systems where the focus of a continuous query is limited to a set of the most recent tuples. In ...