  We present the construction of the Dirac sigma models by gauging the
2-dimensional nonlinear sigma models, but also including the possibility of
nonminimal coupling to the metric sector. We show that for a large variety of
possible cases, the minimal coupling to the metric sector is the only
nontrivial possibility. In addition, we present the construction of the
classical Batalin-Vilkovisky action for the Dirac sigma models. We follow a
direct approach in its construction, by requiring it to be a solution of the
classical master equation.
