Abstraction: a key notion for reverse engineering in a system reengineering approach

摘要

This paper advocates that extracting formal specification semantically consistent to the original legacy system will facilitate further redesign and forward engineering greatly. The three parts of reengineering could be integrated on the basis of a wide spectrum language. The key approach to comprehension and the production of formal specification is a notion of abstraction. Transformation can help to change the original source code into alternative forms, but with the same semantics.