Logtalk is an object oriented extension to the Prolog programming language (its name came from Prolog and Smalltalk). It is based on a reflexive architecture aimed to obtain an open system, easily tailored to user needs. It implements simple inheritance and a delegation mechanism.

Logtalk includes features for event-based programming, enabling the creation of elegant solutions to represent and maintain relations.

Logtalk is available in the WWW at the URL:

http://www.ci.uc.pt/logtalk/logtalk.html