Detection and exploitation of functional dependencies for model generation

Autor: Broes De Cat, Maurice Bruynooghe
Rok vydání: 2013
Předmět:
Zdroj: Theory and Practice of Logic Programming. 13:471-485
ISSN: 1475-3081
1471-0684
DOI: 10.1017/s147106841300029x
Popis: Recent work in Answer Set Programming has integrated ideas from Constraint Programming. This has led to a new field called ASP Modulo CSP (CASP), in which the ASP language is enriched with constraint atoms representing constraint satisfaction problems. These constraints have a more compact grounding and are handled by a new generation of search algorithms. However, the burden is on the modeler to exploit these new constructs in his declarative problem specifications. Here, we explore how to remove this burden by automatically generating constraint atoms. We do so in the context of FO(·)-IDP, a knowledge representation language that extends first-order logic with, among others, inductive definitions, arithmetic and aggregates. We uncover functional dependencies in declarative problem specifications with a theorem prover and exploit them with a transformation that introduces functions. Experimental evaluation shows that we obtain more compact groundings and better search performance. ispartof: Theory and Practice of Logic Programming vol:13 issue:4 pages:471-485 ispartof: location:Istanbul status: published
Databáze: OpenAIRE