If the element has a type attribute, use its value to figure out how the number of each list item should be formatted (Roman numerals, Arabic numerals, or alphabetic characters).
如果元素有type属性，则用这个值来决定应该如何格式化每个列表项的数字(罗马数字、阿拉伯数字或按字母次序的字符)。
Attribute names can include the same characters as element names, with similar rules for omitting Spaces and starting names with alphabetic characters.
属性名可以包含在元素名中使用的字符，规则也是类似的，即字符之间不能带有空格，名称只能以字母开始。
Attribute names can include the same characters as element names, with similar rules for omitting Spaces and starting names with alphabetic characters.
属性名可以包含在元素名中使用的字符，规则也是类似的，即字符之间不能带有空格，名称只能以字母开始。
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