About Bro documentation !

I got a copy of Bro, vp-bro-0-6-alpha_tar, (I don't know is there a newer
version now?)

There isn't a newer version yet, though I hope to put out 0.7 within a
month or so.

So, at
first, I start drawing it's "Class-relations Scheme", which will describes
the relations between Bro's classes. Is there any one did it?

I don't know of anyone doing this, and it would certainly be handy to have!