Technical Reports (CIS)

Document Type

Technical Report

Date of this Version

June 1988

Comments

University of Pennsylvania Department of Computer and Information Science Technical Report No. MS-CIS-88-40.

Abstract

λ-Prolog is a logic programming language that extends Prolog by incorporating notions of higher-order functions, λ-terms, higher-order unification, polymorphic types, and mechanisms for building modules and secure abstract data types. These new features are provided in a principled fashion by extending the classical first-order theory of Horn clauses to the intuitionistic higher-order theory of hereditary Harrop formulas. The justification for considering this extension a satisfactory logic programming language is provided through the proof-theoretic notion of a uniform proof. The correspondence between each extension to Prolog and the new features in the stronger logical theory is discussed. Also discussed are various aspects of an experimental implementation of λ-Prolog.

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Date Posted: 18 September 2007