Your web browser may be malfunctioning. Your internet connection may be unreliable. Browsers do not display the HTML tags, html5 and css complete pdf use them to interpret the content of the page. Inclusion of CSS defines the look and layout of content.
HTML and the CSS standards, has encouraged the use of CSS over explicit presentational HTML since 1997. CERN researchers to use and share documents. The first publicly available description of HTML was a document called “HTML Tags”, first mentioned on the Internet by Tim Berners-Lee in late 1991. It describes 18 elements comprising the initial, relatively simple design of HTML. Eleven of these elements still exist in HTML 4. HTML has been progressively moved in this direction with CSS.
Berners-Lee considered HTML to be an application of SGML. IETF’s philosophy of basing standards on successful prototypes. 1993, suggested standardizing already-implemented features like tables and fill-out forms. 1994, the IETF created an HTML Working Group, which in 1995 completed “HTML 2. 0”, the first HTML specification intended to be treated as a standard against which future implementations should be based. Further development under the auspices of the IETF was stalled by competing interests.