Inclusive measurements on diffractive processes in ep collisions

measurements from the h1 and zeus collaborations of the diffractive deep-inelastic scattering process, ep ？ exy, where y is a proton or a low mass proton excitation, are presented for photon virtualities in the range 2.2 < q2 < 1600 gev2 and squared four-momentum transfer at the proton vertex satisfying | t | < 1 gev2. diffractive parton distribution functions and their uncertainties are determined from a next-to-leading order dglap qcd analysis. combining measurements of the inclusive diffractive deep-inelastic scattering process with an analysis of diffractive dijet production allows a very sensitive determination of both quark and gluon distributions.