Abstract: The Semantically-Interconnected Online Communities (SIOC) ontology, created in 2004, its goal is to interconnect the Social Media (SM) on the web to make data understandable by machines and to standardize the users’ profiles, the interactions, etc. in a common format to ensure the storage and the exchange between the sites. This format is understandable by software agents allowing inferring automatically relationships between users, sites, topics, etc. However, its set of concepts is quite related to forums (the more popular SM at the SIOC creation moment), so, an extension to fully cover the most actual popular SM seems essential.