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).
您要使用label属性，实际上，Exhibit将其视为一个标识符(换言之，它将具有相同标签的对象合拢在一起)。
You need a label property, which Exhibit actually treats as an identifier (in other words, it folds together objects with the same label).
这样的Jazz项目应该包含有一个“标识符”属性，通过它来识别相应的外部性对象。
And such Jazz items should include an "identifier" property by which corresponding external objects are identified.
对象trext：Theft和nc：Location是兄弟，它们各自具有一个s：id属性，提供一个惟一的标识符。
The objects trext: Theft and nc: Location are siblings, and each has an s: id attribute giving it a unique identifier.
例如，Product映射使用identify属性来指示对象的哪个特性充当对象标识符。
For example, the mapping for Product USES the identity attribute to indicate which property of the object serves as the object identity.
一个代理对象享有其自己的标识符，而且除了继承源对象的属性和方法外，还能拥有独自的属性和方法。
A deputy object has its own persistent identifier, and may have additional attributes and methods that are not derived from its source objects.
一个代理对象享有其自己的标识符，而且除了继承源对象的属性和方法外，还能拥有独自的属性和方法。
A deputy object has its own persistent identifier, and may have additional attributes and methods that are not derived from its source objects.
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