Systems often exhibit hierarchical structures and multiple levels of abstraction, and MultiAgent Systems, even if they have proved their adequacy to model such systems, mains in their larger part at one or two abstraction levels. It seems uncertain in this context that MAS will be able to catch efficiently the whole complexity of such systems. Holonic Multi-Agent Systems and their intrinsic hierarchical structure appears as a natural alternative. In this paper we propose a generic framework for HMAS modeling based upon an organizational approach. The means to model a compound holon using organizations and how to conciliate in a generic way the holonic structure with problem-dependent behaviors, are detailed. Different aspects related to the holon dynamics : holon creation, members integration and self-organization are also studied.