Semantic Web isn't a completelyt new idea but an extension of web 2.0. A concept coined by Tim-Berners Lee who saw how the web can somehow be improved, especially in terms of search engines. Berners-Lee observes that although search engines show much of the Web's content, they have little ability to select the pages that a user really wants or needs. For example,because of the hypertext link, 'anything can link to anything. Therefore there could be a mix match of commercial and academic material. At 'one end theres fice-second TV commerical to poetry' and then 'on the other end we have databases, programs and sensor output'.
However semantic web is trying to change all this. It will change how the current internet is made for humans and not for machines to understand. The semantic web is a vision of information that is understandable by computers, so that they can perform more of the tedious work involved in finding, sharing, and combining information on the web, rather than it involving human interaction
Berners-Lee, T (2001) 'The Semantic Web' http://www-personal.si.umich.edu/~rfrost/courses/SI110/readings/In_Out_and_Beyond/Semantic_Web.pdf
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