  A NLO QCD analysis of the HERMES and COMPASS data on pion multiplicities is
presented. Sets of pion fragmentation functions are extracted from fits to the
data and compared with those obtained from other groups before these data were
available. The consistency between HERMES and COMPASS data is discussed. We
point out a possible inconsistency between the HERMES [x, z] and [Q^2, z]
presentations of their data.
