  The positive weight next-to-leading-order matching formalism (POWHEG) is
applied to Deep Inelastic Scattering (DIS) and the related Higgs boson
production via vector-boson fusion process in the Herwig++ Monte Carlo event
generator. This scheme combines parton shower simulation and
next-to-leading-order calculation in a consistent way which only produces
positive weight events. The simulation contains a full implementation of the
truncated shower required to correctly model soft emissions in an
angular-ordered parton shower.
