Illuminating the Web

When he first postulated the World Wide Web two decades ago, Tim Berners-Lee dreamed that "all the bits of information in every computer ... on the planet would be available to me and to anyone else. There would be a single, global information space." In theory, his dream has come true. Anybody with an Internet connection can access the vast treasure of information available on the Web. In practice, though, many of those riches remain hidden from view. The Web universe is simply too big and too strange a place for simple search engines to navigate and make sense of....