因为JAXP确实只是一个包装器API(无论人们如何使用它)，它无法使用SAX和DOM提供的任意选项。

Because JAXP really is just a wrapper API (no matter how people are using it), it simply can't support every option that SAX and the DOM provide.

youdao

这些选项不分先后顺序，所以您可以以任意次序指定。

The options are not ordered so you can specified in any sequence.

youdao

而且让用户使用这种选项指定任意组将破坏安全性。

Also, letting users specify arbitrary groups using this option can lead to security breaches.

youdao