Internet is currently experiencing one of its umpteenth technological revolutions. In substance, it is gradually moving from a digital network connecting 'documents' to a digital network connecting 'information': the difference lies in the fact that while the 'documents' are accessible and above all interpretable by humans, 'information' can be accessed and to some extent also interpreted by machines (computers). It is the first step in the direction of the so-called 'artificial intelligence', not so much that of the Blade Runner's nexus, as the one described by Tim Berners-Lee in the famous 2001 Scientific American article 'The Semantic Web', centered on the activity of so-called 'intelligent agents'. Many strenuous activities that today weigh mainly on human intelligence are attributed to computers, finally able to tap into the meaning (semantic) of the available information with all the benefits and facilities that come with it.