Abstract
A detailed study of abstract semilinear evolution equations of the form u + Au = µ(u) is undertaken, where −A generates an analytic semigroup and µ(u) is a Banach space valued measure depending on the solution. Then it is shown that the general theorems apply to a variety of semilinear parabolic boundary value problems involving measures in the interior and on the boundary of the domain. These results extend far beyond the known results in this field. A particularly new feature is the fact that the measures may depend nonlinearly and possibly nonlocally on the solution.