The theory and algorithms proposed in this paper can be completely extended to multi-level hierarchical system.
本文提出的理论与方法完全可以推广到多级递阶系统。
Let us consider the following scenario of multi-level hierarchical data display and data updating in a web page.
我们仔细检查下面这个场景：一个web页面中的层级数据显示和数据更新。
Specialization also provides support for multi-level or hierarchical specializations, which allow more general topic types to serve as the common denominator for different specialized types.
专门化还为多层或分级规范提供了支持，允许更一般的主题类型作为不同特殊类型的公共基础。
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