Definitions | event_system{i:l}, t T, x:A. B(x), es-E(es), es-isrcv(es; e), b, destination(l), loc(e), <a, b>, Id, s = t, void, x:AB(x), P Q, False, A, x:A B(x), let x,y = A in B(x;y), t.1, case b of inl(x) => s(x) | inr(y) => t(y), if b then t else f fi , P Q |