111 search results - page 6 / 23 » Incomplete Information in Relational Temporal Databases |
ICDT
2012
ACM
11 years 11 months ago
2012
ACM
Previous studies of incomplete XML documents have identified three main sources of incompleteness – in structural information, data values, and labeling – and addressed data ...
ICDT
2009
ACM
14 years 9 months ago
2009
ACM
We study containment and equivalence of (unions of) conjunctive queries on relations annotated with elements of a commutative semiring. Such relations and the semantics of positiv...
SIGMOD
2011
ACM
12 years 11 months ago
2011
ACM
Considering a broad definition for service contracts (beyond web services and software, e.g. airline tickets and insurance policies), we tackle the challenges of building a high ...
DAMON
2008
Springer
13 years 10 months ago
2008
Springer
A major performance bottleneck for database systems is the memory hierarchy. The performance of the memory hierarchy is directly related to how the content of disk pages maps to t...
DBA
2004
2004
A Tool for Transforming Conceptual Schemas of Spatio-Temporal Databases with Multiple Representation
13 years 10 months ago
Nowadays, classical conceptual models (such as ER or UML) are used for designing database applications. These classical conceptual models usually come with associated CASE tools a...