  We study single-hadron inclusive electroproduction in ep scattering at DESY
HERA at next-to-leading order in the parton model of quantum chromodynamics
endowed with non-perturbative fragmentation functions. Specifically, we
consider charged-hadron production, with unspecified transverse momentum p_T,
in the Breit frame and D^{*+-} production as a function of p_T, and perform
comparisons with recent data from the H1 Collaboration.
