real FUNCTION dbar00hb00(xin,q2in) *********************************************************** c parametrization of dbar from a fit to dis data c available for : 0.000057 <= x <= 0.906052 and c c 1.500 <= q2 <= 35000.000 c* c for q2 or x outside limits, the closest c limit is assumed : f2(x>xmax,q2)=f2(xmax,q2) c f2(xq2max)=f2(x,q2max) c f2(x,q2