|Open CASCADE Technology (OCCT) documentation is composed of three main parts:|
1) Open CASCADE Technology Overview included into OCCT distribution package. RoboHelp® is used to keep up this introduction to OCCT (in the HTML format) that deals with compatibility and installation issues and provides a general description of OCCT modules and other features.
2) All modules and development tools are described in User's Guides, available in Adobe Portable Document Format (PDF). To read this format, you need Adobe Acrobat Reader, which is a freeware and can be downloaded from Adobe website. All User’s Guides can be accessed directly from Open CASCADE Technology Overview (see item  above).
3) Reference Documentation is supported on the level of .cdl (Class Description Language) and .hxx files and generated by DOXYGEN software, an open source documentation system.
This Doxygen generated documentation is supplied in the form of a separate package, in a usual .html file format. Documentation is generated by OCCT modules (OCAF, Foundation Classes, Visualization, etc).
Doxygen documentation is much more convenient to the users since it contains all OCCT Class Hierarchy in text and graphic modes, description of classes, methods, functions, enumerations, variables and typedefs.
Inheritance relations between classes are represented by means of graphs.