notation attribute

基本解释

To select an attribute, use the @ sign before the attribute name; otherwise, the notation is pretty similar.
选择属性的时候要在属性名前使用 @ 符号，其他方面和元素都一样。
For example, consider an element EXAMPLE with an attribute "notation" that has a default value of "decimal". The DTD fragment might be
假定我们考虑一个元素ELEMENT，它带有一个"notation"属性，其缺省值为"decimal"。
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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。