标记 (markup) 这个术语用于描述消息格式中不属于数据值的那些字符。

Markup is the term used to describe those characters in a message format that are not data values.

youdao

包含标记和属性的XML文件如果像示例一样格式化，就是格式良好的，这意味着标记是对称的，字符的编码正确。

An XML document that contains tags and attributes formatted like the examples provided is well formed, which means the tags are balanced, and the characters are encoded properly.

youdao

重访清单2中xml格式的原子坐标，我们发现94.5%的字符都是标记，只有5.5%的字符是实际值。

Revisiting the atom coordinates in XML format in Listing 2, we find that 94.5 percent of the characters are markup, and only 5.5 percent of the characters are actual values.

youdao