[thelist] How to do nonlinear instructions?

[trevor]

I also like with the wiki idea for that type of document.

Have you checked out  TiddlyWiki, by Jeremy Ruston? Seems very well suited 
for something like this. The built-in tagging functionality seems just 
right.

In fact the tagline for tiddlywiki reads:
" TiddlyWiki a reusable non-linear personal web notebook "

http://www.tiddlywiki.com/

Good luck with the writing, best regards./trevor