The growing choice of e-learning platform technologies leads to new difficulties. In particular, it becomes hard to manage or to compare available platforms and to re-use existing course material from different kinds of platforms because of technological discrepancy. This paper proposes a tentative solution of this difficulty - a common platform- independent framework that can be used to specify and classify existing or future learning management systems (LMS) and possibility of their cooperation. The proposed framework is based on OMG's Model Driven Architecture