Learning objects are increasingly seen as key to a technology-based revolution in education and training, and even to an emerging global knowledge economy. Word-wide efforts are underway to formulate standards that will enable Learning Object (LO) reuse and exchange among multiple educational settings, instructors, courses and institutions. The scope of this deliverable is to appropriately define the notion of learning content available on corporate networks or the Internet, as well as to provide the core information modeling constructs of e-Learning applications. We survey several e-Learning standards (e.g., delivered by European efforts such as ARIADNE, American efforts such as IMS, ADL and AICC and international efforts such as IEEE LTSC, ISO/IEC, JTC1/SC36, CEN/ISSS, DC) and we consider the feasibility of expressing these standards using Semantic Web languages such as W3C RDF/S. We exhibit the interrelationships of existing standards in order to support instructors, learners and teachers in locating and (re)using digital educational material. We conclude our deliverable with the most important pedagogical limitations of existing standards, which are crucial for deploying a fully-fledged Self e-Learning Network.