73 search results - page 4 / 15 » Least Generalization under Relative Implication |
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ICDT
2009
ACM
15 years 10 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
2001
ACM
15 years 9 months ago
2001
ACM
Virtually all proposals for querying XML include a class of query we term "containment queries". It is also clear that in the foreseeable future, a substantial amount of...
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COCO
2007
Springer
15 years 3 months ago
2007
Springer
We study a model of graph related formulae that we call the Constraint-Graph model. A constraintgraph is a labeled multi-graph (a graph where loops and parallel edges are allowed)...
CVPR
2010
IEEE
14 years 9 months ago
2010
IEEE
Motion-based face recognition is a young research topic, inspired mainly by psychological studies on motionbased perception of human faces. Unlike its close relative, appearance-b...
PODS
2010
ACM
14 years 9 months ago
2010
ACM
We study functional and multivalued dependencies over SQL tables with NOT NULL constraints. Under a no-information interpretation of null values we develop tools for reasoning. We...