  The D_s^+ pi^0 and D_s^{*+} gamma decays of the D_{s0}^+(2317) are studied by
assigning it to various charmed strange scalar mesons. As a result, it is found
that its assignment to an iso-triplet four-quark meson is favored by the
severest experimental constraint on the ratio of the rates for these decays,
while assigning it to an I=0 state (a four-quark or a conventional {c\bar{s}})
is inconsistent with this constraint.
