Quark flavor separation in Lambda-baryon fragmentation

It is shown that unpolarized and polarized Lambda and <(Lambda)over bar> pr oduction in neutrino and antineutrino deep inelastic scattering, can provid e a clean separation of unpolarized and polarized fragmentation functions o f a quark into a Lambda, for both light-flavor quarks and antiquarks and al so for strange quarks. Combining with Lambda and <(Lambda)over bar> product ion in polarized electron deep inelastic scattering, one can systematically measure or check the various flavor and spin dependent fragmentation funct ions. Such measurements can provide crucial tests of different predictions concerning the spin structure of hadrons and the quark-antiquark asymmetry of the nucleon sea.