2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39676We briefly summarize the equivalence of off-diagonal generalized vector dominance and the colour-dipole approach to deep-inelastic scattering (DIS) in the diffraction region of values of $x \simeq Q^2/W^2 << 1$.3 pages, Latex using epsfig, 2 figures using 3 eps files. Contribution to DIS2000, Liverpool, April 2000High Energy Physics - Phenomenologytext