The Home of the Semantic Web
"The Semantic Web is an extension of the current Web in which information is given well-defined meaning, enabling computers and people to work in better cooperation. The Web will reach its full potential when it becomes an environment where data can be shared and processed by automated tools as well as by people" - Tim Berners-Lee and Eric Miller.
The link address is: http://www.w3.org/2001/sw/