  Generalized complex geometry is a new mathematical framework that is useful
for describing the target space of N=(2,2) nonlinear sigma-models. The most
direct relation is obtained at the N=(1,1) level when the sigma model is
formulated with an additional auxiliary spinorial field. We revive a
formulation in terms of N=(2,2) semi-(anti)chiral multiplets where such
auxiliary fields are naturally present. The underlying generalized complex
structures are shown to commute (unlike the corresponding ordinary complex
structures) and describe a Generalized Kahler geometry. The metric, B-field and
generalized complex structures are all determined in terms of a potential K.
