Code generation documentation?

[Paul Spencer]

Where can I find documentation on the code generation used by MyFaces? 
As an example, 
tomahawk/src/java/org/apache/myfaces/custom/calendar/HtmlInputCalendar.java 
 contains generated code.  The file HtmlInputCalendar.xml appears to be 
used by the code generator.

What else is being generated by HtmlInputCalendar.xml?
Paul Spencer