az-azb and azj

Hi. In first thank for your attention to Wp/azb.))) Az&aze(Azerbaijani language) (http://en.wikipedia.org/wiki/ISO_639_macrolanguage) divide two part: azj (http://www.sil.org/iso639-3/documentation.asp?id=azj) :North Azerbaijani language that write with latin alfabe and azb (http://www.sil.org/iso639-3/documentation.asp?id=azb) :South Azerbaijani language that write with arab alfabet. Thanks