They just add semantic value, and you can use them to write CSS that gives them visual treatments to match that semantic value.
它们只是添加语义值，您可以使用它们来编写向它们提供视觉处理来匹配该语义值的 CSS。
2
Following all these parameters, you should get the print out match a specify data character set and this is represent a specify visual characteristics of the finished print.
遵循这些参数，你会得到满足给定数据特性的最终印样，这也代表了所规定的视觉特性最终印样。
3
The overall visual styleesembles a match ticket, or match day programme - relaying a real 'fan' feel.