I really hated it when I needed to view a RDF/XML document in the browser, Safari in my particular case. All you can see is a white page with lots of unformatted strings on it. No structure was visible at all. The only way to get a slightly better look at the document, was to view the page’s source code. And as you probably guessed or experienced yourself there is also no way of viewing it in a readable/formatted/colored way.