  We are concerned with Mosco type convergence for a non-symmetric $n$-particle
Fleming-Viot system $\{X_1,\ldots,X_n\}$ in a bounded $d$-dimensional domain
$D$ with smooth boundary. Moreover, we are interested in relative compactness
of the $n$-particle processes. It turns out that integration by parts relative
to the initial measure and the generator is the appropriate mathematical tool.
For finitely many particles, such integration by parts is established by using
probabilistic arguments. For the limiting infinite dimensional configuration we
use a result from infinite dimensional non-gaussian calculus.
