A duality-like transformation in WZNW models inspired by dual Riemannian globally symmetric spaces

We investigate transformations on the group manifold element and gauged fields on two different kinds of gauged WZNW models and thus obtain a duality-like transformation between chiral- and vector-gauged WZNW models with null gauged subgroups that exactly converts the chiral-gauged WZNW action to vector-gauged WZNW action and vice versa. These duality-like transformations correspond to the duality in Riemannian globally symmetric spaces