This article seeks an adequate manner to stand for a generative process in architecture. The processes of typology development in a vernacular architecture is adopted. As a proper cultural object, a type is perceived as a general principle of creation, a supra-individual mechanism. In that context, there are some issues concerning the research problem: how to adequately represent a poiesis? The related theories to support this research development are distinct. However, the theoretical framework point out shape grammar as a base for generative process representation in architecture. A generative system that operates with the same generative logic is proposed.