Abstract: The reuse technology becomes more and more important in software development．But it is difficult to design a universal component for every domain．Domain·specific software reuse aims at the specific domain．Domain engineering extends software engineering．The design of domain framework is the most important thing of o’omal‘n en—gineering．This paper discusses some key technologies an d some strategies about domain framework．

Key words: domain engineering；framework；design pattern；software architecture；refactoring