Definitions | let x,y,z = a in t(x;y;z), w-machine(w;i), x:A. B(x), , A, isnull(a), x:A B(x), Id, vartype(i;x), n+m, #$n, P & Q, P  Q, islocal(k), A & B, b, isl(x), valtype(i;a), outl(x), act(k), s = t, type List, Msg(M), w.M, m(i;t), f(a), kind(a), val(a), a(i;t), x.A(x), s(i;t).x |