SOME FUNDAMENTAL ISSUES IN EXCLUSIVE AND SEMI-INCLUSIVE REACTIONS

We describe some of the recent developments in testing the Standard Model, beginning with the tremendous progress that has been made concerning our theoretical understanding of strangeness in the proton (the analogue of the Lamb shift in QED). We also summarise the contribution of parity violation, from electron-proton to neutrino-nucleus scattering, in testing the evolution of the weak charge of the proton predicted by the Standard Model. Finally, we describe recent progress in the calculation of fragmentation functions, which may prove important in the exploration of new observables such as transversity.