“Like XHTML, SVG, and RSS, XForms is an XML-based language written with tags that can be identified by surrounding angle brackets. (XML purists perfer to call these elements) Learning XForms is largely a matter of understanding what individual elements do, as well as how they interrelate. One difference is that XForms provides several more elements than form authors might be accustomed to. As a result, several tasks that would have otherwise required complicated scripting can be accomplished declaratively, just by putting the right elements in place.” (About XForms Institute)