In some cases, you may want to build a hierarchical knowledge base, consisting of nodes at multiple levels in the hierarchy.

在某些情况下，可能需要构建层次化知识库(hierarchical knowledge base)，这种结构将节点放在层次结构的多个级别上。

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It is organized into a hierarchical structure to convey the parent-child relationship of terms and concepts and often associated with content management, knowledge management and search technologies.

它被组织成一个层次结构，以表示术语和概念的隶属关系，通常与内容管理、知识管理和搜索技术关联。

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Native XML storage implies storing XML data intact with full DBMS knowledge of the data's internal hierarchical structure.

原生xml存储意味着按原样存储XML数据，DBMS完全了解数据的内部层次结构。

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