[NTG-context] Reading the source...?

Hi, assume that I would like to read some parts of the ConTeXt source (to learn something interesting, to learn how to do that-and-that in ConTeXt, or just for fun;)). Where do I start? I mean: what is the non-terribly-difficult way for the beginner? I have rather good expertise in plain TeX and also some in LaTeX (if this helps). Thanks in advance -- Marcin Borkowski (http://mbork.pl) - Is it a Perl program or a Perl script? - Well, a script is what you give the actors. A program is what you give the audience. (Larry Wall)