  European perspectives are discussed on fixed-target electron or positron
scattering experiments using polarized and unpolarized beams and targets in
various combinations. The goal envisioned is a deep and complete understanding
of the momentum and spin structure of hadrons in the context of Quantum Chromo
Dynamics, based on measurements at moderate and low photon virtualities. This
program can be realized by performing electron-nucleon experiments with high
resolution and high luminosity, at beam energies of at least 25-30 GeV.
