Definitions | , A B, hd(l), (x l), P  Q, sender(e), i j, Top, ||as||, P Q, SQType(T), {T}, P  Q, x when e, vartype(i;x), ES, T, True, val(e), valtype(e),  b, b, A, False, x:A. B(x), if b t else f fi, IdLnk, rcv(l,tg), , D realizes es. P(es), Dsys, D1 D2, World, FairFifo, PossibleWorld(D;w), A & B, E, Id, loc(e), source(l), P & Q, Prop, Knd, kind(e), ES(the_w), x:A. B(x), P  Q, t T |