  We introduce a generalization of CM-triviality relative to a fixed invariant
collection of partial types, in analogy to the Canonical Base Property defined
by Pillay, Ziegler and Chatzidakis which generalizes one-basedness. We show
that, under this condition, a stable field is internal to the family, and a
group of finite Lascar rank has a normal nilpotent subgroup such that the
quotient is almost internal to the family.
