The UK is a world leader in what used to be known as the 'semantic web'.Tim Berners-Lee has done much to champion the idea of marking up online data sets with information about their meaning, using the Resource Description Framework (RDF) standard. It was presumably his advocacy that led, in 2010, to the surreal spectacle of then-prime minister Gordon Brown publicly celebrating the move "from a web of managing documents and files to a web of managing data and information". The BBC's use of RDF to organise its archive was the most frequently cited semantic web case study. And for a time, the semantic web looked like a ripe commercial opportunity for British vendors. In 2011, Birmingham-based library management software company Talis sold its legacy portfolio to Capita, in part to refocus on its emerging semantic web business.