  We discuss the inclusive production of J/psi mesons in deep-inelastic
scattering (DIS) via the electromagnetic, weak neutral, and charged currents
within the factorization formalism of nonrelativistic quantum chromodynamics.
Theoretical predictions are confronted with experimental data of e p and nu N
DIS taken by the H1 Collaboration at DESY HERA and the CHORUS Collaboration at
CERN, respectively.
