By accident, came across this cool old site which documents the Squeak 3.2 Class structure.
Maybe it will give someone ideas for later Squeak versions.
<
http://www.oldenbuettel.de/> 07.01.2002 - Bernd Oldenbuettel
System Categories
<
http://www.oldenbuettel.de/squeak-doku/index.html>
Squeak Class Documentation (Squeak3.2alpha-4599)
<
http://www.oldenbuettel.de/squeak-doku/class_index.html>