You can use four predefined annotation types — referred to as meta-annotations — to annotate your annotations.
您可以使用4种预定义的注释类型(称为元注释)对您的注释进行注释。
Using annotations (also called attributes) you can even associate meta data to classes and some of their contents (operations, fields).
使用注解(也称为特性)，你甚至可以关联元数据与类和类的其他内容(操作、字段)。
The most obvious meta-annotation is one that allows you to indicate which program elements can have annotations of the defined type.
最明显的元注释就是允许何种程序元素具有定义的注释类型。
The default metadata source for validations is annotations, but the developers can extend the meta-data through the use of XML descriptors.
其默认的元数据源是注解，但开发者可以通过XML描述符对其进行扩展。
The default metadata source for validations is annotations, but the developers can extend the meta-data through the use of XML descriptors.
其默认的元数据源是注解，但开发者可以通过XML描述符对其进行扩展。
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