Domination of semigroups generated by regular forms

We give a representation for regular forms associated with dominated C 0 C_0 -semigroups which, in turn, characterizes the domination of C 0 C_0 -semigroups associated with regular forms. In addition, we prove a relationship between the positivity of (dominated) C 0 C_0 -semigroups and the locality of the associated forms.