Factorization, in the sense defined for inclusive hard scattering, is
discussed for diffractive hard scattering. A factorization theorem similar to
its inclusive counterpart is presented for diffractive DIS. For hadron-hadron
diffractive hard scattering, in contrast to its inclusive counterpart, the
expected breakdown of factorization is discussed. Cross section estimates are
given from a simple field theory model for non-factorizing
double-pomeron-exchange (DPE) dijet production with and without account for
Sudakov suppression.Comment: 6 pages, Latex, DIS 97 tal
