Operator product expansion for Wilson loops and surfaces in the large<i>N</i>limit

The operator product expansion for ``small'' Wilson loops in $\mathcal{N}=4,$ $d=4$ SYM theory is studied. The OPE coefficients are calculated in the large N and ${g}_{\mathrm{YM}}^{2}N$ limit by exploiting the AdS-CFT correspondence. We also consider Wilson surfaces in the (0,2), $d=6$ superconformal theory. In this case, we find that the UV divergent terms include a term proportional to the rigid string action.