The deep web : Surfacing hidden value
Michael K. Bergman · 2001
Searching on the Internet today can be compared to dragging a net across the surfgace of the ocean. While a great deal may be caught in the net, there is still a wealth of information that is deep, and therefore, missed. The reason is simple. Most of the Web's information is buried far down on dynamically generated sites, and standard search engines never find it.