The inter­net today exists of an enor­mous amount of HTML doc­u­ments, full of struc­tured data, which is largely inac­ces­si­ble for appli­ca­tions. The rea­son for this is that com­put­ers are unable to autonomous deter­mine the seman­tic con­text of these data. Because of this search engines can find, but not under­stand these data. More