[NTG-context] siunitx feature in unit module

Hi, with siunitx LaTeX package its possible to obtain physics units like m/s printed in different way changing one option: e.g. \si{\metre\per\second} produce ms^{-1} \si[per-mode=symbol]{\metre\per\second} produce m/s \si[per-mode=fraction]{\metre\per\second} produce \frac{m}{s} have the unit module the same feature? If yes how can obtain the effect (I didn't find nothing on the manual)? Thank you for help -- Andrea De Michele