The variable top attribute controls which characters to ignore and is only meaningful if the alternate attribute is not non-ignorable.

可变上限属性控制哪些字符被忽略，只在替代属性不是不可忽略的情况下这些字符才是有意义的。

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Then, you added metadata using the rel attribute for link relationships and the property attribute on non-links.

之后，您使用用于链接关系的rel属性以及非链接中的property属性添加了元数据。

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For example, the say hello command has a mandatory attribute called name and non-mandatory attribute called country.

例如，say hello命令有一个称为name的强制性属性和一个称为country的非强制性属性。

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