  We investigate coherence length effects and hadron attenuation in lepton
scattering off nuclei in the kinematic regime of the HERMES experiment. The
elementary electron-nucleon interaction is described within the event generator
PYTHIA while a full coupled-channel treatment of the final state interactions
is included by means of a BUU transport model. The results of our calculations
are in good agreement with the experimentally measured transparency ratio of
incoherent rho0 electroproduction off Nitrogen and the multiplicity ratio R_M^h
for charged hadrons, pions, kaons, protons and anti-protons in deep inelastic
scattering off Nitrogen and Krypton targets.
