class csu {
    %% Conjunction of Subordination
     <: simple_categories;
     node SubS : [cat: S, type: subst, top:[sat: -, extraction: -|topic]];
     node SubComp : [cat: comp, type: subst, id: SubS];
     node SubAlt : [type: alternative];
     SubAlt >> SubS;
     SubAlt >> SubComp;
     SubS < SubComp;
     node CS : [cat: CS, id:CS];
     node Anchor : [cat: csu];
     CS >> Anchor;
     CS >> SubAlt;
     Anchor < SubAlt;
    node(CS).bot.tense = node(SubS).top.tense;
    node(CS).bot.mode = node(SubS).top.mode;
    node(CS).bot = value(@defaultagr);
    node(CS).bot.que = node(Anchor).top.que;
    desc.ht = value([arg0:@emptyarg_fs,arg1:@emptyarg_fs,arg2:@emptyarg_fs]);
    %% desc.dummy.real=value(S|comp);
    SubS +
        desc.dummy.real = value(S);
    SubComp +
        node(Anchor).bot.que = value(+),
        desc.dummy.real = value(comp);
    Anchor +
        node(Anchor).bot.que = value(+|que),
        desc.dummy.real=value(S),
        node(SubS).top.mode = value(subjonctive|indicative|gerundive|participle|conditional|adjective)
        |
        node(Anchor).bot.que = value(+),
        desc.dummy.real=value(comp)
        |
        node(Anchor).bot.que = value(-),
        node(SubS).top.mode = value(~subjonctive|infinitive|participle|gerundive|adjective)
        ;
}