================================================================= Logtalk - Object oriented extension to Prolog Release 2.9.1 Copyright (c) 1998-2001 Paulo Moura. All Rights Reserved. ================================================================= This folder contains several examples of Logtalk programs. Most of these examples need objects, protocols, and categories that are defined in the Logtalk standard library or in other examples, so you should load them first (see the NOTES file inside each example folder). Some examples may redefine objects already loaded from other examples. You may want to restart Logtalk after trying each example. Some of the examples code have been adopted from public available Prolog code and from known Prolog text books and are copyrighted by the respective authors. These are programming examples, meaning that you should look at the source files to fully understand them. All examples are formatted using four spaces tabs. Here is a short description of each included example: birds bird identification expert system example adopted from the Adventure in Prolog Amzi! book bricks example of representation and handling of relations using events classvars example of implementation of class variables (as found in Smalltalk) errors example showing the Logtalk compiler warning and error reporting inheritance examples of public, protected and private inheritance with both prototypes and classes/instances instmethods example of instance defined methods lo examples adopted from the Francis G. McCabe L&O system lpa examples adopted from the LPA Prolog++ system metapredicates example of using metapredicates in Logtalk objects mi multi-inheritance examples miscellaneous unsorted examples parametric simple example of parametric objects poem examples adopted from the Ben Staveley-Taylor POEM system points example adopted from SICStus Objects documentation polygons example of representation and handling of relations using events profiling examples of using of events and monitors to implement profilers reflection example of a simple class-based reflective system relations objects implementing predicates for dealing with relations and constrained relations between objects roots objects, protocols and categories needed by most of the other examples searching state-space searching framework example adopted from Ivan Bratko's "Prolog Programming for Artificial Intelligence" book sicstus examples adopted from SICStus Objects documentation symdiff example of using parametric objects to implement symbolic expression differentiation and simplification viewpoints example on how to implement property and value sharing with prototypes