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» A Logic For Causal Reasoning
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LPNMR
1993
Springer
15 years 10 months ago
Negation as Partial Failure
We present a logic programming language which uses a four-valued bilattice as the underlying framework for semantics of programs. The two orderings of the bilattice reflect the c...
Bamshad Mobasher, Jacek Leszczylowski, Don Pigozzi
ICLP
1990
Springer
15 years 10 months ago
Extending Definite Clause Grammars with Scoping Constructs
Definite Clause Grammars (DCGs) have proved valuable to computational linguists since they can be used to specify phrase structured grammars. It is well known how to encode DCGs i...
Remo Pareschi, Dale Miller
FLOPS
2004
Springer
15 years 10 months ago
LIX: an Effective Self-applicable Partial Evaluator for Prolog
This paper presents a self-applicable partial evaluator for a considerable subset of full Prolog. The partial evaluator is shown to achieve non-trivial specialisation and be effect...
Stephen-John Craig, Michael Leuschel
CSL
2006
Springer
15 years 10 months ago
A Sequent Calculus for Type Theory
Based on natural deduction, Pure Type Systems (PTS) can express a wide range of type theories. In order to express proof-search in such theories, we introduce the Pure Type Sequent...
Stéphane Lengrand, Roy Dyckhoff, James McKi...
ESWS
2006
Springer
15 years 10 months ago
Rules with Contextually Scoped Negation
Knowledge representation formalisms used on the Semantic Web adhere to a strict open world assumption. Therefore, nonmonotonic reasoning techniques are often viewed with scepticism...
Axel Polleres, Cristina Feier, Andreas Harth