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2004
Springer

Weighted Answer Sets and Applications in Intelligence Analysis

10 years 4 months ago
Weighted Answer Sets and Applications in Intelligence Analysis
The extended answer set semantics for simple logic programs, i.e. programs with only classical negation, allows for the defeat of rules to resolve contradictions. In addition, a partial order relation on the program’s rules can be used to deduce a preference relation on its extended answer sets. In this paper, we propose a “quantitative” preference relation that associates a weight with each rule in a program. Intuitively, these weights define the “cost” of defeating a rule. An extended answer set is preferred if it minimizes the sum of the weights of its defeated rules. We characterize the expressiveness of the resulting semantics and show that it can capture negation as failure. Moreover the semantics can be conveniently extended to sequences of weight preferences, without increasing the expressiveness. We illustrate an application of the approach by showing how it can elegantly express subgraph isomorphic approximation problems, a concept often used in intelligence analys...
Davy Van Nieuwenborgh, Stijn Heymans, Dirk Vermeir
Added 02 Jul 2010
Updated 02 Jul 2010
Type Conference
Year 2004
Where LPAR
Authors Davy Van Nieuwenborgh, Stijn Heymans, Dirk Vermeir
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