  We present data on strange particle production in elementary proton-proton
collisions at RHIC energies. Comparison to leading order and next-to-leading
order (NLO) calculations shows that the fragmentation process is flavor
dependent and that higherorder corrections are needed to describe all spectra,
in particular at these collision energies, which are modest compared to the
Tevatron energies. A model (EPOS) which takes into account multiple scattering
between projectile constituents seems to describe the data best.
