The purpose of this article is to extend the application of the communities of practice to the e-learning field which handles an interdisciplinary techno-pedagogic knowledge: cognitive, psycho-pedagogic, multi-media, software, etc. We propose a new category of CoPs called CoPE (Communities of Practice of E-learning) which combines two fields: CoPs as basic field, and E-learning as an application domain. To be able to capitalize the knowledge in a CoPE, we propose an ontology entitled “Onto’CoPE” that aims to model the members of the CoPE and their roles, the learning situations, and annotating the CoPE’s knowledge resources through activities and possible types of interactions, as well as the environment made up of services, tools and resources. The paper briefly describes our method for building our ontology, its structure, and contents.