Attribute

Attribute （标签属性）用于拓展 HTML for paragraph. Note that the end tag's name is preceded by a slash character, "</p>", and that in empty elements the end tag is neither required nor allowed. If attributes are not mentioned, default values are used in each case.">tag，可改变标签行为或提供元数据，属性总是以name = value的格式（属性的识别码后接与之相关的值）