  A systematic multiple scattering formalism for vector meson electroproduction
from nuclei is developed, with emphasis on the formation, propagation and
hadronization scales for quark-gluon fluctuations of the virtual high-energy
photon. The theory is compared to HERMES measurements of rho electroproduction
on 14N. The nuclear transparency as a function of the vector meson propagation
length is well reproduced.
