297 search results - page 30 / 60 » On the Decidability of Consistent Query Answering |
ER
2007
Springer
14 years 2 months ago
2007
Springer
XML Schema supports the specification of occurrence constraints by declaring values for its min/maxOccurs attributes. These constraints are structural in the sense that they rest...
EDBT
2011
ACM
12 years 12 months ago
2011
ACM
A question that database administrators (DBAs) routinely need to answer is how long a batch query workload will take to complete. This question arises, for example, while planning...
ICDE
2008
IEEE
14 years 9 months ago
2008
IEEE
We study new hierarchical indexing approach to process XPATH queries. Here, a hierarchical index consists of index entries that are pairs of queries and their (full/partial) answer...
MDM
2010
Springer
14 years 1 months ago
2010
Springer
Motivated by many applications, top-k query is a fundamental operation in modern database systems. Technological advances have enabled the deployment of large-scale sensor networks...
AAAI
2012
11 years 11 months ago
2012
We tackle the problem of defining a well-founded semantics (WFS) for Datalog rules with existentially quantified variables in their heads and negations in their bodies. In partic...