The World Wide Web and HTML may have been invented by Tim Berners Lee (Berners-Lee and Fischetti, 1999, p. 29), but it was based on an old version of SGML used at CERN (Palmer, 2000). Apart from the addition of the anchor <a> tag in HTML, most of the structure of HTML was taken ultimately from the GML ‘Starter’ tag set (GML, 1991).