If a rev element is present, then the intermediary should add a via element as the first subelement of that rev element.

如果有rev元素，那么中介体应该添加一个via元素作为该rev元素的第一个子元素。

youdao

If a rev element is present, then the intermediary should add a via element as the first subelement of that rev element.

如果有rev元素，那么中介体应该添加一个via元素作为该rev元素的第一个子元素。

youdao