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Hierarchical Database Model

层次模型 是用树形结构(也叫父子结构)描述实体及其之间关系的 数据模型。该模型中每一个 记录 都是一个节点,记录之间的联系通过有向线段表示,每个双亲节点可以有多个子节点,而每个子节点只能有一个双亲节点。

层次结构 只能处理一对多实体联系。

Hierarchical Database Definition

A hierarchical database is a data model in which data is stored in the form of records and organized into a tree-like structure, or parent-child structure, in which one parent node can have many child nodes connected through links.[1]

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