UML的整体应该分为业务建模和系统建模，前者更倾向于对业务过程的描述和功能的梳理，而后者更倾向于系统设计，指导开发。-UML as a whole should be divided into business modeling and system modeling, the former was more inclined to describe the business processes and functions of the comb, while the latter is mor