Deep inelastic scattering at large energy and momentum transfers: Recent results from HERA

Data from H1 and ZEUS on the structure of the proton and its quark and gluon densities are discussed. A brief excursion is made into the field of inclusive diffraction by deep inelastic scattering. The comparison of e(-)p and e(+)p scattering at large momentum transfers demonstrates clearly the presence of weak contributions in neutral current interactions. The comparison with the corresponding charged current results shows at Q(2) values above the masses squared of the heavy vector bosons the unification of electromagnetic and weak interactions. The new data are testing the validity of the Standard Model down to spatial resolutions of the order of 10(-16) cm.