  We revisit the construction of topological Yang-Mills theories of the Witten
type with arbitrary space-time dimension and number of ``shift supersymmetry''
generators, using a superspace formalism. The super-BF structure of these
theories is exploited in orderto determine their actions uniquely, up to the
ambiguities due to the fixing of the Yang-Mills and BF gauge invariance. UV
finiteness to all orders of perturbation theory is proved in a gauge of the
Landau type.
