Fragmentation functions using e+e- data from PETRA and LEP

We investigate fragmentation of charged particles in e(+)e(-) annihilation at 22, 35, and 44 GeV in terms of their polar angle and momentum distributions. From the angular distribution the ratio of longitudinal to total hadronic cross-section was determined at an average energy scale of 36.6 GeV to be sigma(L)/sigma(tot) = 0.076 +/- 0.013. At next-to-leading order this yields alpha(s)(36.6GeV) = 0.150 +/- 0.025. The xi drop ln(1/x) distributions were used in conjunction with OPAL data from 91-208 GeV to study the scale dependence of the maximum position, xi(0). We studied flavour dependence of xi(0) as a possible explanation of this problem, using direct flavour dependent measurements of xi(0) at 91 GeV by OPAL.