  The Dalitz decays of the positive parity $D_{sJ}^{(*)}$ charmed mesons,
$D_{sJ}^{(*)} \to D_s^{(*)} \ell^+ \ell^-$ with $J=0,1,2$ and $\ell=e, \mu$,
are important processes to investigate the nature of the $D_{sJ}^{(*)}$ states.
We analyze the full set of decays, considering the four lightest $D_{sJ}^{(*)}$
mesons as belonging to the heavy quark spin doublets $\displaystyle
s_\ell^P=\frac{1}{2}^+$ and $\displaystyle \frac{3}{2}^+$, with $s_\ell^P$ the
spin-parity of the light degrees of freedom in mesons. The description implies
relations among the observables in various modes. We study the decay
distributions in the dilepton invariant mass squared and the distributions in
the angle between the charged lepton momentum and the momentum of the produced
meson, which are expressed in terms of universal form factors and of effective
strong couplings. Such measurements are feasible at the present facilities.
