  In this paper we specify research assumptions introduced and used in "The
meta-structure project" to be considered both to model and design collective
behaviours as given by coherent mesoscopic dynamics. We specify concepts of
interaction and dynamics both in homogeneous and non-homogeneous cases, i.e.,
fixed and variable structures. We specify consequent modelling and design
approaches. We also present and discuss approaches to measure the level of
complexity allowed or detected in collective behaviours intended as coherent
mesoscopic dynamics. We mention the possibility to model properties of domains
of coherence, for instance, populations of oscillators and molecules, by using
meta-structural properties to be eventually considered also for quantum
coherent domains.
  Keywords: Coherence, Collective, Dynamics, Homogeneous, Interaction,
Mesoscopic, Meta-structural, Property.
