Syntax: Doctype

doctype html is shorthand for <!doctype html>. It’s only allowed at the beginning of the document.

doctype html

These other doctypes are available:

Expug	HTML
`doctype html`	`<!DOCTYPE html>`
`doctype xml`	`<?xml version="1.0" encoding="utf-8" ?>`

Custom doctypes

You may use other doctypes.

doctype html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"