The attribute can be one that already exists in the LDAP schema, or the administrator can choose to extend the LDAP schema creating a brand new attribute.
这个属性可以是LDAP架构中现有的属性，管理员也可以选择扩展LDAP架构，创建一个全新的属性。
The primary advantage of defining everything separately is that it's simple to extend, for example by adding a class attribute to all form controls.
分别定义不同成分的主要好处是容易扩展，比如为所有的表单控件添加class属性。
As I extend Spring JMX, I'll demonstrate each of the three areas of concern with a simple use case: an example service with start and stop methods and a read-write attribute to be managed.
在扩展Spring JMX时，我将用一个简单的案例分别展示这三个需要关注的领域：一个带有开始和停止方法并且有一个读写属性要管理的示例服务。
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