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142
Voted
PODS
2007
ACM
16 years 3 months ago
2007
ACM
The generalized hypertree width GHW(H) of a hypergraph H is a measure of its cyclicity. Classes of conjunctive queries or constraint satisfaction problems whose associated hypergr...
137
Voted
PODS
2008
ACM
16 years 3 months ago
2008
ACM
In the study of data exchange one usually assumes an openworld semantics, making it possible to extend instances of target schemas. An alternative closed-world semantics only move...
128
Voted
PODS
2008
ACM
16 years 3 months ago
2008
ACM
A schema mapping is a specification that describes how data from a source schema is to be mapped to a target schema. Once the data has been transferred from the source to the targ...
157
click to vote
EDBT
2002
ACM
16 years 3 months ago
2002
ACM
Abstract. Estimating the sizes of query results, and intermediate results, is crucial to many aspects of query processing. In particular, it is necessary for effective query optimi...
127
Voted
ICSE
2005
IEEE-ACM
16 years 3 months ago
2005
IEEE-ACM
Predicting software quality as perceived by a customer may allow an organization to adjust deployment to meet the quality expectations of its customers, to allocate the appropriat...