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CONSTRAINTS
2008
70views more  CONSTRAINTS 2008»
13 years 7 months ago
Reformulating Table Constraints using Functional Dependencies - An Application to Explanation Generation
We present a novel approach to automatically reformulating constraints defined as tables of allowed assignments to variables. Constraints of this form are common in a variety of se...
Hadrien Cambazard, Barry O'Sullivan
ICSOC
2010
Springer
13 years 5 months ago
Automatic Fragment Identification in Workflows Based on Sharing Analysis
In Service-Oriented Computing (SOC), fragmentation and merging of workflows are motivated by a number of concerns, among which we can cite design issues, performance, and privacy. ...
Dragan Ivanovic, Manuel Carro, Manuel V. Hermenegi...
FOIKS
2010
Springer
13 years 10 months ago
On the Existence of Armstrong Data Trees for XML Functional Dependencies
Armstrong databases are a popular tool in example-based database design. An Armstrong database for a given constraint set from a fixed constraint class Z satisfies precisely those ...
Sven Hartmann, Henning Köhler, Thu Trinh
PODS
2010
ACM
197views Database» more  PODS 2010»
13 years 7 months ago
When data dependencies over SQL tables meet the logics of paradox and S-3
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...
Sven Hartmann, Sebastian Link