可以使用属性列表声明声明XML元素类型的属性。

You can declare attributes for an XML element type using an attribute list declaration.

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表示法声明为现有表示法提供内部名称，以便可以在属性列表声明、未分析实体声明和处理指令中引用。

The notation declaration gives an internal name to an existing notation so that it can be referred to in attribute list declarations, unparsed entity declarations, and processing instructions.

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通过设置目标属性中的目标URI列表，生产者声明了所生产消息要发往的目的地。

A producer declares where the messages it produces are sent through a list of one or more target URIs in its target attribute.

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