而基于分区的类似的持久性解决方案通常都需要向数据库模式添加一个特殊的列来识别分区标识。
Similar partition-based persistence solutions often require that a special column be added to the database schema to identify the partition identifier.
为此目的，标识面向业务的Web服务，您现在将需要选择忽视持久性和系统层。
For this purpose, to identify business-oriented Web services, you're going to choose to ignore the persistence and system layers for now.
相反，它只需要程序员将属性标记为持久性的，并识别出能代表对象唯一标识符(或者主键)的属性。
Instead, it requires the developer only to denote the attributes to be persisted and to identify the attribute to represent the object's unique identifier (or primary key).
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