catia tutorial - Preface

http://www.cadfamily.com/a/CAD_CAID/CATIA/catia-tutorial---Preface_3141.html
The CATIA Generative Knowledge product provides you with an easy  way to describe the data
used to create documents and to store this data in a script file so that it can be re-used later
on.  Here are the benefits of using the generative script:
the script code itself is small in size (a few K)
the syntax is easy to grasp
it executes rapidly from CATIA
it allows you to add knowledgeware information in the form of expert rules and checks to
a document and store the whole data in a readable file.
Moreover, it offers a full compatibility with external documents by providing you with an import
capability. Features belonging to external documents can be referred to and instantiated in a
script. Of course, a document which has been generated from a script can be modified
interactively.
The present version of the product covers a broad range of mechanical features as well as
some knowledgeware features.
Important note: The upward compatibility of the syntax provided for this version is not
guaranteed.