class ou_non 
{
    %% may modifify positive sentence by 'ou advneg'
    %% example: il vient ou non ?
    %% example: il va, ou non, venir ?
    - x_modifier;
    node(Foot).dummy.cat = value(advneg);
    node(Root).cat = value(S|aux|VMod|CS);
    Foot < Incise;
    node Modifier: [type: sequence];
    Modifier >> ou; node ou : [type: coanchor, lex: ou, cat: coo, id: coo];
    Modifier >> alt; node alt: [type: alternative];
    alt >> advneg; node advneg : [ type: coanchor, cat: advneg, id: advneg];
    alt >> non; node non: [type: coanchor, lex:non, cat: adv, id:advneg];
    ou < alt;
    advneg < non;
    desc.dependency = value('mod');
}