What is the Semantic Web?

The Semantic Web is an extension of the current web, in which information is given well defined meaning, better enabling computers and people to work in cooperation.

Information that has well defined meaning is in a form that machines can understand, rather than simply display.

Machine understandable documents does not imply some magical artificial intelligence allowing machines to comprehend human speech, rather it relies solely on the machine's ability to solve well defined problems by performing well defined operations on well defined data.