Thankfully, Hibernate provides a way to associate class names to string constants using the <meta-value> XML element.

谢天谢地，Hibernate 还提供了一个用 <meta-value>XML 元素把类名映射到字符串约束的方法。

youdao

It is a first class entity in the meta-model of SimpleRDB, but it has no equivalent in UML 2.0. That is why the signature of the relation has no formal parameter that relates a UML element.

它是SimpleRDB的通用模型的第一个类实体，但是在UML 2.0中没有它的对等体。这就是关联的签名没有与uml元素相关的形式参数的原因。

youdao

The meta data "{row: 1, column -> One} as A" means the UI element, a TextBox in our case, is in row 1 and the same column as where the header "One" is. The test code is very clean, for example

元数据“{row: 1, column -> One} as A”意味着我们例子中的UI元素——一个TextBox，处于第一行，并和header“One”处在同一列。

youdao