________ . ________ Documentation Overview . The iGEN documentation provides you with a basic understanding of those iGEN capabilities that will help you build models for your particular application. iGEN documentation includes: Users’ Reference Guide CEL and C++ Shell Reference Guide Users’ Reference Guide This guide describes the fundamental concepts of the COGNET modeling methodology, iGEN installation procedures, iGEN IDE interface, and how to build, run and debug an iGEN cognitive model. In addition, it contains an operator reference section. CEL and C++ Shell Reference Guide This guide describes the COGNET Execution Language (CEL) and communications shell development. It provides a description of syntax, operators, and compatibility. This guide is intended for analysts and/or programmers who are responsible for developing and/or maintaining the cognitive agent’s communication shell.