Cogui in a nutshell (version 1.0) gives a quick overview of what kind of knowledge can be represented.

Beginners can read getting started (version 1.0) and the frequently asked questions (version 1.0)

A tutorial with exercises (version 1.2).

A complete user guide (version 1.3) is available, and describes how to use CoGui with screenshots and flash animations.

Conceptual Graphs (CGs) were introduced by John Sowa. To learn more about the CG model implemented in CoGui (and in Cogitant) read the book of Michel Chein and Marie-Laure Mugnier «Graph-based Knowledge Representation»