BTW, in this case there's no, repeat no, ActiveRecord involved. At times you may want to create some XML that's, horrors, not based on a model inheriting from ActiveRecord. Or even, any model at all.
If you get this worked up about finding one method in the documentation and not understanding the purpose of another, I would recommend another occupation than programming. You're bound to run into much bigger issues than these over the course of a career in this profession. It sounds like it'd be best to get out before your soul surrenders to such rage.
P.S.: For anyone in doubt, this is not acceptable behavior on the mailing list. If you're looking for help, please filter your anger out before posting.