The simple relationship between the elastic polarization and elastic cross section derived previously is generalized to include inelastic processes. The resulting data-to-data relations express the inelastic polarization in terms of the corresponding unpolarized scattering distribution and two spin ''lengths'' related to the relative strength and range of the spin orbit to central fundamental amplitudes. The success of these relations in describing inelastic analyzing powers indicates that little new nuclear structure information can easily be obtained from such experiments.