Consider the specialization hierarchy for a reference topic.
下图是一个引用主题的专门化层次结构。
Define the specialization hierarchy for the element with class attribute.
为具有class属性的元素定义专门化层次结构。
Each level of specialization has its own set of class attributes, which in the end provide the full specialization hierarchy for all specialized elements.
每个层次的专门化都有自己的一组class属性,最终提供了所有专门化元素的专门化层次结构。
应用推荐