Processing instructions and comments are also reduced to special tag names that are not available in XML: PI for the former, comment for the latter.

处理指令和注释也简化了标签名，这在XML中是无法实现的：前者用PI，后者用COMMENT。

youdao

Processing instructions and comments are also reduced to special tag names that are not available in XML: PI for the former, comment for the latter.

处理指令和注释也简化了标签名，这在XML中是无法实现的：前者用PI，后者用COMMENT。

youdao