the ones that have been verified by Lucas, is Sokan combat philosophy. theres many references to it. Also Vaapad, Shien and Jar'Kai....those are the subforms that are references from trustable sources.
however im not entirely sure about Trachata, Kai-Kan, Jan-Sai and Chodan. They have little reference so im guessing they are probably not canon.
read all the subforms here, on the end of the explanation for Vaapad. i doubt its source is trusted, cause its mentioned only vaguely ....
I think you guys are right. Its fan fiction,