Off-Diagonal Generalized Vector-Dominance and Colour-Dipoles in Low-x   DIS
  We 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 $x \simeq Q^2/W^2 << 1$. 
D. Schildknecht