class adj_range 
{
    %% range construction: adj à adj
    %% example: Feuilles jaunes à rouges
    AdjP >> range;  node range: [type: sequence, optional: yes];
    range >> prep; node prep: [cat: prep, type: coanchor, bot: [ pcas: à]];
    range >> adj2; node adj2: [id: range, cat: adj, type: coanchor];
    prep < adj2;
    adj < range;
    node(adj).top.number =  node(adj2).top.number;
    node(adj).top.gender =  node(adj2).top.gender;
    range =>
        desc.@real0 = value(-|N2),
        desc.@real1 = value(-),
        desc.@real2 = value(-)
        ;
    range < arg0::Arg;
    range < arg1::Arg;
}