Leach Albert, Javier and Nieva Soto, Susana and Rodríguez-Artalejo , Mario
(2001)
*Constraint Logic Programming with Hereditary Harrop formulas.*
Theory and Practice of Logic Programming , 1
(4).
pp. 409-445.
ISSN 1471-0684

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Official URL: http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=78817

## Abstract

Constraint Logic Programming (CLP) and Hereditary Harrop formulas (HH) are two well known ways to enhance the expressivity of Horn clauses. In this paper, we present a novel combination of these two approaches. We show how to enrich the syntax and proof theory of HH with the help of a given constraint system, in such a way that the key property of HH as a logic programming language (namely, the existence of uniform proofs) is preserved. We also present a procedure for goal solving, showing its soundness and completeness for computing answer constraints. As a consequence of this result, we obtain a new strong completeness theorem for CLP that avoids the need to build disjunctions of computed answers, as well as a more abstract formulation of a known completeness theorem for HH.

Item Type: | Article |
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Additional Information: | This is a substantially revised and extended version of an earlier paper (Leach, Nieva and Rodrguez-Artalejo, 1997). The authors have been partially supported by the Spanish National Project TIC 98-0445-C03-02 TREND and the Esprit BRA Working Group EP-22457 CCLII. |

Uncontrolled Keywords: | Constraint systems, Hereditary Harrop formulas, Uniform proofs, Goal solving |

Subjects: | Sciences > Computer science > Programming languages (Electronic computers) |

ID Code: | 17171 |

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Deposited On: | 22 Nov 2012 10:23 |

Last Modified: | 07 Feb 2014 09:43 |

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