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- From: hodas@saul.cis.upenn.edu (Josh Hodas)
- Newsgroups: comp.archives
- Subject: [comp.lang.prolog] Announcing "Lolli", An Interpreter for Linear-Logic Programming
- Followup-To: comp.lang.prolog
- Date: 8 Nov 1992 08:24:04 GMT
- Organization: University of Pennsylvania
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- X-Original-Date: 7 Nov 92 20:34:53 GMT
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- Archive-name: auto/comp.lang.prolog/Announcing-Lolli-An-Interpreter-for-Linear-Logic-Programming
-
- In conjunction with the upcoming Joint International Conference and
- Symposium on Logic Programming, and in particular the Workshop on
- Linear Logic and Logic Programming, I am pleased to announce the first
- public distribution of Lolli, an interpreter for logic programming
- based on linear logic principles.
-
- The language Lolli (named for the linear logic implication operator
- "-o" called lollipop), is a full implementation of the language
- described in the paper "Logic Programming in a Fragment of
- Intuitionistic Linear Logic" (Josh Hodas & Dale Miller, to appear in
- Information and Computation), though it differs a bit in syntax, and
- has several built-in extra-logical predicates and operators.
-
- Lolli can be viewed as a refinement of the the Hereditary Harrop
- formulas of Lambda-Prolog. All the operators (though not the higher
- order unification) of Lambda-Prolog are supported, but with the
- addition of linear variations. Thus a Lolli program distinguishes
- between clauses which can be used as many, or as few, times as
- desired, and those that must be used exactly once.
-
- These features have been used to provide a perspicuous, logical
- implementation of a number of example problems, including
- object-oriented programming with mutable state, database update, and
- term rewriting. Lolli has also been used as the setting for the
- development of a filler-gap dependency parser for natural language
- processing. This last is described in the paper "Specifying
- Filler-Gap Dependency Parsers in a Linear Logic Programming Language",
- by Josh Hodas, to be presented at JICSLP '92.
-
- This preliminary implementation was developed over the last year and
- is based on code written by Frank Pfenning and Conal Elliot for their
- paper "A Semi-Functional Implementation of a Higher-Order Logic
- Programming Language" which appears in "Topics in Advanced Language
- Implementation", MIT Press, Peter Lee editor. DVI files for this
- paper, as well as the two papers mentioned above, are included with
- the distribution.
-
- To retrieve a copy of the Lolli system, ftp (anonymously) to
- ftp.cis.upenn.edu and retrieve the file pub/Lolli/Lolli-07.tar.Z. (Be
- sure to set ftp to BINARY transfer first.) This distribution includes
- full ML source, along with a Makefile, as well as the papers mentioned
- above and a collection of example programs. For those who do not have
- SML-NJ at their site, we hope to provide pre-built binaries for a
- variety of architectures. These binaries can be found on
- ftp.cis.upenn.edu in the directory pub/Lolli/binaries. At present
- Sparc and NeXT binaries are available. If you compile lolli on a new
- architecture, please contact me so that I can make your binary
- available.
-
-
-
- ----------------------------------------------------------------------------
- Josh Hodas Home Phone: (215) 222-7112
- 4223 Pine Street School Office Phone: (215) 898-9514
- Philadelphia, PA 19104 E-Mail Address: hodas@saul.cis.upenn.edu
-
-