THE LOW-Q(2), LOW-X REGION IN ELECTROPRODUCTION

The authors summarize existing experimental and theoretical knowledge of the structure function F-2 in the region of low Q(2) and low x. Con straints on the behavior of structure functions in the limit of Q(2)=0 are listed. Phenomenological low-Q(2) parametrizations of F-2 are col lected, and their dynamical content is discussed. High-energy photopro duction and nuclear shadowing are described briefly. A recent update o f the low-Q(2), low-x experimental data and their implications is give n.