"It's a problem Web designers face every day. Your pages look great, they exploit the latest cutting-edge Web technologies, and they even offer simplified versions for the older browsers still in use today. You've reached the holy grail of Web publishing - a shining example of an intelligently designed Web site. Then version X of browser Y featuring technology Z comes along. Suddenly, you're faced with the unenviable and all-too-common task of retooling the dozens (or hundreds, or thousands) of pages on your site. 'We're falling behind!' reads the frantic email from some vice president of Big Words. 'Go look at www.we're-cooler-than-you.com. They've completely redesigned!' » What do you do?" Read it in the article Designing for the Future with XML.