Perturbative QCD predicts an energy independent limit for the density
of partons at small momenta in a jet which follows from the colour coh
erence in soft gluon production. The existing data on the charged and
identified particle inclusive spectra in e(+)e(-) annihilation follow
closely the perturbative prediction for partons which is in support of
the local parton hadron duality picture also for low momentum particl
es. Further tests of this interpretation of the data are proposed.