The geometric scaling property observed in the HERA data at small x, that
the deep inelastic scattering (DIS) total cross-section is a function of only
the variable Q^2*x^\\lambda, has been argued to be a manifestation of the
saturation regime of QCD and of the saturation scale Q^2_s(x) x^{-\\lambda}.
We show that this implies a similar scaling in the context of diffractive DIS and
we observe, for several diffractive observables, that the experimental data from
HERA confirm the expectations of this scaling.
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