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PODS
2007
ACM
14 years 10 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...
PODS
2008
ACM
14 years 10 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...
EDBT
2008
ACM
14 years 10 months ago
2008
ACM
There has been much recent interest in on-line data mining. Existing mining algorithms designed for stored data are either not applicable or not effective on data streams, where r...
ICSE
2005
IEEE-ACM
14 years 10 months ago
2005
IEEE-ACM
Existing spreadsheet systems allow users to change cells arbitrarily, which is a major source of spreadsheet errors. We propose a system that prevents errors in spreadsheets by re...
ICFP
2004
ACM
14 years 10 months ago
2004
ACM
Among slide-presentation systems, the dominant application offers lly no abstraction capability. Slideshow, an extension of PLT Scheme, represents our effort over the last several...