XML for the world wide web

Clearly, the Internet is changing the world. In the last ten years, since Tim Berners-Lee designed the World Wide Web (1991) and Marc Andreesen and company developed Mosaic—née Netscape (1993)—to display it on any PC or Mac, the Internet has gone from interesting to essential, from ancillary to completely central. Web sites are now a required part of a business' infrastructure, and often part of one's personal life as well. The amount of information available through the Internet has become practically uncountable. No one knows exactly how many Web pages are out there, although the number is probably close to two billion, give or take a...