We consider a family of minimal relations L0(?) generated by an integral
equation with a Nevanlinna operator measure and give a description the
families L0(?), L* 0(??), where ? ? C. We prove that the families L0(?), L*
0(??) are holomorphic and give a description of families relations T(?) such
that L0(?) ? T(?) ? L* 0(??) and T?1(?) are bounded everywhere defined
operators. The results obtained are applied to the proof of the existence of
a characteristic operator for the integral equation.