Doctype Html

Some articles on doctype, html, doctype html:

Document Type Declaration - DTDs - HTML5 DTD-less DOCTYPE
... HTML5 uses a DOCTYPE declaration which is very short, due to its lack of references to a Document Type Definition in the form of a URL or FPI ... All it contains is the tag name of the root element of the document, HTML ... is treated case sensitively by validators), this format (a case-insensitive match of the string !DOCTYPE HTML) is the same as found in the syntax of the SGML based HTML 4.01 DOCTYPE ...