17 search results - page 1 / 4 » On First-Order Query Rewriting for Incomplete Database Histo... |
TIME
2009
IEEE
13 years 11 months ago
2009
IEEE
ICDT
2005
ACM
13 years 10 months ago
2005
ACM
We consider the problem of retrieving consistent answers over databases that might be inconsistent with respect to some given integrity constraints. In particular, we concentrate o...
IJCAI
2003
13 years 6 months ago
2003
In previous work, Levesque proposed an extension to classical databases that would allow for a certain form of incomplete first-order knowledge. Since this extension was suffici...
CSFW
2003
IEEE
13 years 10 months ago
2003
IEEE
SPKI/SDSI is a language for expressing distributed access control policy, derived from SPKI and SDSI. We provide a first-order logic (FOL) semantics for SDSI, and show that it ha...
ICDE
2007
IEEE
14 years 6 months ago
2007
IEEE
Incompleteness due to missing attribute values (aka "null values") is very common in autonomous web databases, on which user accesses are usually supported through media...