Pion and kaon fragmentation functions at next-to-next-to-leading order

We present a new determination of unpolarised charged pion and kaon fragmentation functions from set single-inclusive electron-positron annihilation lepton-nucleon semi-inclusive deep-inelastic scattering data. The includes next-to-next-to-leading order QCD corrections to both processes, is carried out in framework that combines neural-network parametrisation with Monte Carlo representation their uncertainties. discuss the quality determination, particular its dependence on higher corrections.