Empty tags must follow a special syntax .

空标记必须遵循特殊的语法。

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You can also use this form to clean out stale items like empty tags.

您也可以通过这个表单来清楚失效的条目，比如空标签。

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An XML document can have some empty tags that do not have anything inside and can be expressed as a single tag instead of as a set of beginning and end tags.

XML文档可以使用内部不包含任何内容的空标记，这些标记可以表示为单个标记，而不是一组开始和结束标记。

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