Abstract submitted to the
        XVIII International Workshop on Deep-Inelastic Scattering and
                            Related Subjects, DIS 2010
                        19-23 April, 2010, Florence, Italy
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                     Diffractive PDF fits at HERA

                          ZEUS Collaboration

                              Abstract

ZEUS inclusive diffractive cross-section measurements have been
used in a DGLAP next-to-leading-order QCD analysis to extract the
diffractive parton distribution functions. Data on diffractive
dijet production in deep inelastic scattering have also been
included to constrain the gluon density. Predictions based on the
extracted parton densities are compared to diffractive charm and
dijet photoproduction data.