“On the web, CSS is the style sheet language of choice. However, the usefulness of CSS is not limited to screens. If you want to transfer web content — be it XML or HTML — onto paper, there are good reasons to use CSS. The language is radically simpler than that of XSL, and it is suitable both on-screen and on paper. This means that you probably don’t have to write a stylesheet at all but can reuse an existing one.” (Håkon Wium Lie and Michael Day – xml.com)