Overview of Spin physics at HERMES and COMPASS

The investigation of the partonic degrees of freedom beyond collinear approximation (3D description) has been gained increasing interest in the last decade. At the HERMES and COMPASS deep-inelastic-scattering experiment, several first measurements has been made which provide new insights on peculiar aspects of the parton dynamics within the nucleon or during fragmentation, i.e. related to spin-orbits effects. Complementary information has been gathered from spin-asymmetries in inclusive, semi-inclusive and exclusive channels. The two experiments feature a complementary energy regime, different beam and target set-ups and hadron identification in the final state to access flavor sensitivity. A compendium of the most interesting results will be presented.