For the sake of completeness I've received a reply from Slavomir Polivka of (whom I thank very much).
It states: "Fomapan 100ASA 35mm has special colored blue-gray backing to eliminate halation. Its not the same as anti-halation backing of 120 and sheet film."

So the pdf has no typo: Fomapan 100 classic has NO anti-halation backing and relies completely on the base colour to eliminate halation.