13 search results - page 2 / 3 » On the Local Closed-World Assumption of Data-Sources |
ICLP
1994
Springer
13 years 9 months ago
1994
Springer
In many cases, a logic program can be divided into two parts, so that one of them, the \bottom" part, does not refer to the predicates de ned in the \top" part. The \bot...
DEXAW
2006
IEEE
13 years 9 months ago
2006
IEEE
When a database is defined as views over autonomous sources, inconsistencies with respect to global integrity constraints are to be expected. This paper investigates the possibili...
BTW
2005
Springer
13 years 11 months ago
2005
Springer
Abstract: Peer data management systems (PDMS) are the natural extension of integrated information systems. Conventionally, a single integrating system manages an integrated schema,...
BTW
2005
Springer
13 years 11 months ago
2005
Springer
: Optimizers in modern DBMSs utilize a cost model to choose an efficient query execution plan (QEP) among all possible ones for a given query. The accuracy of the cost estimates de...
DLOG
2007
13 years 8 months ago
2007
Clio is a joint research project between the University of Toronto and IBM Almaden Research Center started in 1999 to address both foundational and systems issues related to the ma...