  A non-linear map is applied onto the (non-standard) null-plane deformation of
(3+1) Poincar\'e algebra giving rise to a simpler form of this triangular
quantization. A universal $R$-matrix for the null plane quantum algebra is then
obtained from a universal $T$-matrix corresponding to a Hopf subalgebra.
Finally, the associated Poincar\'e Poisson--Lie group is quantized by using the
FRT approach.
