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.
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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