Specify a constraining rule between attributes and elements.

在属性和元素之间指定一个约束规则。

You can even define your own custom constraining mechanisms.

甚至可以定义自己的约束机制。

Constraining imagination by knowledge does not make it redundant.

用知识来限制想象并不会让想象变得多余。

But fixed supply will become a constraining factor on economic activity.

但在经济活动中固定的供应将会成为一个约束性的因素。

Specify a constraining rule on the text in an element with mixed content.

在具有混合内容的元素的文本中指定一个约束规则。