How to control the change of component in the process of CBSD,and keep the consistency and stability of component system is the goal of software deve-loper.

• 在基于构件软件开发的过程中,如何以一种良好的风格和技术来对构件变化进行控制,保持构件系统的一致性、稳定性是软件开发者历来追求的目标。