Exploiting the semantic web technologies to understand the OSN (Online Social Networks) features and the implicit behaviour of their members is attracting interest of the both academic and business researches. The semantic community aims at combining the semantic tools and notions to enhance the traditional technics of social networks analysis initially based only on graphs theory. In this context, several ontologies were proposed to model the different modules of OSN. To participate to engineering a unified sematic model for OSN, we propose, in this article, an aligned extension of the well-known social ontologies.