  An NLO QCD analysis of the final HERMES data on pion multiplicities is
presented and a new set of pion fragmentation functions is extracted from the
best fit to the data. We have studied the so-called [x,z] and [Q^2,z]
presentations of their data, as given by HERMES, which, in principle, should
simply be two different ways of presenting the experimental data. We have based
our extraction on an excellent fit to the [Q^2,z] presentation of the data. We
also draw attention to what appears to be a problem with the [x,z] presentation
of the HERMES data.
