Fragmentation functions for KS0 and Λ with complete quark flavour separation

We present new sets of next-to-leading order fragmentation functions for the production of KS0 and Λ particles from the gluon and from each of the quarks, obtained by fitting to all relevant data sets from e+e− annihilation. The individual light quark flavour fragmentation functions are constrained phenomenologically for the first time by including in the data the light quark tagging probabilities measured by the OPAL Collaboration.