A study of model layers and reflection

Systems of reflection ability can change their structure and behavior during their own execution to adapt to changed environment. This paper studies an approach to reflection realization from the point of view of model layers and language and presents a prototype framework incarnating reflection ideas. Reflection can be obtained from modeling languages that can change model elements structure and behavior with changed condition. Existing meta models stress specification of structure of languages and care little about their behavior. This paper explicitly introduces operations into meta models to control the structure and behavior of model elements.