  The parton and hadron cascade model PACIAE 2.1 (cf. Comput. Phys. Commun.184
(2013) 1476) has been upgraded to the new issue of PACIAE 2.2. By this new
issue the lepton-nucleon and lepton-nucleus (inclusive) deep inelastic
scatterings can also be investigated. As an example, the PACIAE 2.2 model is
enabled to calculate the specific charged hadron multiplicity in the $e^-$+p
and $e^-$+D semi-inclusive deep-inelastic scattering at 27.6 GeV electron beam
energy. The calculated results are well comparing with the corresponding HERMES
data. Additionally, the effect of model parameters \alpha and \beta in the Lund
string fragmentation function on the multiplicity is studied.
