persistent classes

基本解释

The static view (Figure 8) refines the persistent classes in the logical view to their physical representation.
静态视图（图 8 ）将逻辑视图中的持久类改进为其物理表示形式。
See "Inheriting from Persistent classes" for a way to isolate programs from the database choice by using inheritance.
有关通过使用继承来将程序与数据库选项隔离的方法，请参阅 “从 Persistent 类继承”。
It also introduces the BaseEntity and AuditableEntity base classes, from which concrete persistent classes can be extended, depending on whether or not auditing information is required for an object.
还引入了 BaseEntity和 AuditableEntity基类，可以根据是否需要对象的审计信息，分别从这些基类派生出具体的持久化类。