Results on inclusive diffraction at ZEUS

The diffractive dissociation of virtual photons, gamma*p --> Xp, has been studied in ep interactions at HERA. The data are presented in terms of the D diffractive structure function F-2(D) and dsigma/dM(X). The Pomeron intercepts, extracted from diffractive and inclusive ep interactions, are compared. The Q(2)variation of the ratio of the diffractive to inclusive cross sections on W, the photon-proton center of mass energy, illuminates the transition from the perturbative, high Q(2), region to the photoproduction limit. The ranges studied in both W and Q(2) are extended with respect to previously available results.