I wrote "predominant", not "official". And I think that is still true. Also, from what I can tell using the site, it does not serve as a full dictionary. Rathe

I wrote "predominant", not "official". And I think that is still true. Also, from what I can tell using the site, it does not serve as a full dictionary. Rather, it lists the general rules of German orthography (as decided by the Rechtschreibrat) and has some limited tables of special words.