更高效的XSLT，用于将XML文档转换为CSV flatfile

I have an XSLT that works and translates my XML doc to CSV. But its hard to read (I don't like all the "../../" references) and I'm wondering if those also hurt performance - the file I'm transforming is big. I've looked at several different examples, but I've only been able to make the one below work.I have an XSLT that works and translates my XML