Time-dependent Dalitz plot analysis of $B^0 \to D^\mp K^0$ Pi+- decays

We present for the first time a measurement of the weak phase 2{beta}+{gamma} obtained from a time-dependent Dalitz plot analysis of B{sup 0}{yields}D{sup {+-}}K{sup 0}{pi}{sup {+-}} decays. Using a sample of approximately 347x10{sup 6} BB pairs collected by the BABAR detector at the PEP-II asymmetric-energy storage rings and assuming the ratio r of the b{yields}u and b{yields}c decay amplitudes to be 0.3, we obtain 2{beta}+{gamma}=(83{+-}53{+-}20) deg. and the equivalent solution at +180 deg. The magnitudes and phases for the resonances associated with the b{yields}c transitions are also extracted from the fit.