The integration between heterogeneous components is an active field of research for the conceptual database modelling community. The spatial representation systems manage data having a great level of heterogeneity. Indeed, with representation are associated alphanumerical attributes. The use of both components at the same time is not easy. We present a generalization technique defined by a semantics selection process. The generalization is applied to composite and non simply connected representations. By this way, we define a middle space for selection.