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Logtalk is an Open-Source, object-oriented logic programming language that extends and leverages the Prolog language with a feature set suitable for programming in-the-large.

Logtalk supports modern code encapsulation and code reuse mechanisms without compromising the declarative programming features of Prolog. Logtalk is implemented in highly portable code and can use most modern and standards compliant Prolog implementations as a back-end compiler. The Logtalk distribution features portable libraries and portable assertions, documenting, diagraming, and unit testing tools, plus extensive code editing and

What's New

Version 3.10.4:
Logtalk Compiler and Runtime
  • [Fixed] Bug in the compiler second stage error handling which could result in a silent source file compilation failure without an error message being printed. Thanks to Xin Wang for the bug report.
  • [Fixed] Compiler bug when reporting an error for calls to the entity creation predicates that resulted in a generic error instead of the


  • OS X 10.3.9 or later
  • Compatible Prolog compiler

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Current Version (3.x)


Downloads 8,899
Version Downloads 29
License Free
Date 06 Apr 2017
Platform OS X / Intel 32
Price Free
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