如何使用XSL删除命名空间并仅保留原始XML文档中的一些元素？

Below is my XML. I wanted to parse this using XSL. What I want to achieve is to remove the namespace (xmlns) then just retain some of the elements and their attributes. I found a way to remove the namespace but when I put it together with the code to retain some of the elements, it doesn't work. I already tried the identity but still didn't work. Below is my XML. I wanted to parse this using X