representation and utilization within different systems. It is argued that this is one of the major stumbling blocks that stand between adaptation and the eLearning mainstream today. Awareness of this problem has given rise to several research efforts, aimed at standardizing as much of the adaptation modelling process as possible, on the basis of existing standards (see, e.g., the “Workshop on Adaptive E-Learning and Metadata” carried out under the auspices of the WM2003 conference - http://wm2003.aifb.uni-karlsruhe.de/workshop/w05/). The “reuse” of existing eLearning standards and their “retargeting” for use in the context of adaptation, which is also a premise of this paper, is intended to: (a) facilitate the smooth and gradual transition from existing non-adaptive learning environments and courses to their adaptive counterparts, and (b) enable the graceful downgrading of adaptive content and activities when delivered over, or supported by, a “traditional” learning environment.