“…Different terms have been used to describe what we call here a level: e.g., perspective, interaction, layer or view (Desmeulles et al, 2009;Parunak et al, 2009;Torii et al, 2005;White, 2007). Some are domain-specific; thus, in the flow modeling domain, when two levels with static relations are considered, models are often described as hybrid as shown in the section 3.2 (Burghout et al, 2005;El hmam et al, 2008El hmam et al, , 2006aMarino et al, 2011;Mathieu et al, 2007a;Nguyen et al, 2012b;Rejniak and Anderson, 2011;Wakeland et al, 2007).…”