  In this note we study several aspects of coisotropic submanifolds of a
contact manifold. In particular we give a structure theorem for the singularity
of the characteristic foliation of a coisotropic submanifold. Moreover we
establish the existence and uniqueness results of germs of contact structures
near Legendrian foliations, which is a special case of coisotropic submanifold.
This note can be thought of as an attempt to generalize the study of surfaces
in three-dimensional contact geometry to higher dimensions.
