E-portfolios have been widely used in the education community. Currently, e-portfolios are viewed mostly as a tool of assessment and showcase, but less as a tool of active learning. This paper proposes an ontological model that specifies a generic organizational structure of e-portfolios in the integrated reflection context. An example of design artifact of ontology of e-portfolios is used to illustrate the concepts of the development and use of e-portfolios for active learning through reflection.