Each step presents a new mapping rule and explains the related concepts; where meaningful, a class diagram illustrates the rule.

每一步表达了一个新的映射规则，并解释了相关的概念；在需要的地方有类图描述规则。

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The following schemas represent the mapping of the UML diagram (see Figure 2) to XML schemas.

下面的模式表示uml图(参阅图2)到XML模式的映射。

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There are three fundamental solutions for mapping inheritance into a relational database, and to understand them I will discuss the trade-offs of mapping the class diagram presented in Figure 1.

将继承映射到关系数据库中有三种基本解决办法，为更好地理解它们，我将讨论在图1中显示的映射类图表的优缺点。

youdao

And opposite a particularly Heath Robinson piece of machinery, complete with foot-long levers and dials like the engine room of the Titanic, I spot an old circuit diagram on the wall, mapping out each of Britain's national newspapers.

ECONOMIST: Snooker, piranhas and a hotline to Moscow