281 search results - page 35 / 57 » Toward Practical Constraint Databases |
CVIU
2010
13 years 8 months ago
2010
We consider the self-calibration problem for the generic imaging model that assigns projection rays to pixels without a parametric mapping. In this paper, we consider the central ...
SDB
1995
14 years 12 hour ago
1995
Most of work on partial information in databases asks which operations of standard languages, like relational algebra, can still be performed correctly in the presence of nulls. In...
ICDT
2007
ACM
14 years 10 days ago
2007
ACM
Abstract. We review key constraints in the context of XML as introduced by Buneman et al. We show that one of the proposed inference rules is not sound in general, and the axiomati...
ICDT
2009
ACM
14 years 9 months ago
2009
ACM
We study the problem of querying data sources that accept only a limited set of queries, such as sources accessible by Web services which can implement very large (potentially inf...
VLDB
2008
ACM
14 years 8 months ago
2008
ACM
Mapping composition is a fundamental operation in metadata driven applications. Given a mapping over schemas 1 and 2 and a mapping over schemas 2 and 3, the composition problem is...