HTML 元素与合法的Doctype

标签	HTML 4.01 / XHTML 1.0			XHTML 1.1
标签	Transitional	Strict	Frameset	XHTML 1.1
<a>	Yes	Yes	Yes	Yes
<abbr>	Yes	Yes	Yes	Yes
<acronym>	Yes	Yes	Yes	Yes
<address>	Yes	Yes	Yes	Yes
<applet>	Yes	No	Yes	No
<area />	Yes	Yes	Yes	No
<b>	Yes	Yes	Yes	Yes
<base />	Yes	Yes	Yes	Yes
<basefont />	Yes	No	Yes	No
<bdo>	Yes	Yes	Yes	No
<big>	Yes	Yes	Yes	Yes
<blockquote>	Yes	Yes	Yes	Yes
<body>	Yes	Yes	Yes	Yes
<br />	Yes	Yes	Yes	Yes
<button>	Yes	Yes	Yes	Yes
<caption>	Yes	Yes	Yes	Yes
<center>	Yes	No	Yes	No
<cite>	Yes	Yes	Yes	Yes
<code>	Yes	Yes	Yes	Yes
<col />	Yes	Yes	Yes	No
<colgroup>	Yes	Yes	Yes	No
<dd>	Yes	Yes	Yes	Yes
<del>	Yes	Yes	Yes	No
<dfn>	Yes	Yes	Yes	Yes
<dir>	Yes	No	Yes	No
<div>	Yes	Yes	Yes	Yes
<dl>	Yes	Yes	Yes	Yes
<dt>	Yes	Yes	Yes	Yes
<em>	Yes	Yes	Yes	Yes
<fieldset>	Yes	Yes	Yes	Yes
<font>	Yes	No	Yes	No
<form>	Yes	Yes	Yes	Yes
<frame />	No	No	Yes	No
<frameset>	No	No	Yes	No
<h1> to <h6>	Yes	Yes	Yes	Yes
<head>	Yes	Yes	Yes	Yes
<hr />	Yes	Yes	Yes	Yes
<html>	Yes	Yes	Yes	Yes
<i>	Yes	Yes	Yes	Yes
<iframe>	Yes	No	Yes	No
<img />	Yes	Yes	Yes	Yes
<input />	Yes	Yes	Yes	Yes
<ins>	Yes	Yes	Yes	No
<isindex>	Yes	No	Yes	No
<kbd>	Yes	Yes	Yes	Yes
<label>	Yes	Yes	Yes	Yes
<legend>	Yes	Yes	Yes	Yes
<li>	Yes	Yes	Yes	Yes
<link />	Yes	Yes	Yes	Yes
<map>	Yes	Yes	Yes	No
<menu>	Yes	No	Yes	No
<meta />	Yes	Yes	Yes	Yes
<noframes>	Yes	No	Yes	No
<noscript>	Yes	Yes	Yes	Yes
<object>	Yes	Yes	Yes	Yes
<ol>	Yes	Yes	Yes	Yes
<optgroup>	Yes	Yes	Yes	Yes
<option>	Yes	Yes	Yes	Yes
<p>	Yes	Yes	Yes	Yes
<param />	Yes	Yes	Yes	Yes
<pre>	Yes	Yes	Yes	Yes
<q>	Yes	Yes	Yes	Yes
<s>	Yes	No	Yes	No
<samp>	Yes	Yes	Yes	Yes
<script>	Yes	Yes	Yes	Yes
<select>	Yes	Yes	Yes	Yes
<small>	Yes	Yes	Yes	Yes
<span>	Yes	Yes	Yes	Yes
<strike>	Yes	No	Yes	No
<strong>	Yes	Yes	Yes	Yes
<style>	Yes	Yes	Yes	Yes
<sub>	Yes	Yes	Yes	Yes
<sup>	Yes	Yes	Yes	Yes
<table>	Yes	Yes	Yes	Yes
<tbody>	Yes	Yes	Yes	No
<td>	Yes	Yes	Yes	Yes
<textarea>	Yes	Yes	Yes	Yes
<tfoot>	Yes	Yes	Yes	No
<th>	Yes	Yes	Yes	Yes
<thead>	Yes	Yes	Yes	No
<title>	Yes	Yes	Yes	Yes
<tr>	Yes	Yes	Yes	Yes
<tt>	Yes	Yes	Yes	Yes
<u>	Yes	No	Yes	No
<ul>	Yes	Yes	Yes	Yes
<var>	Yes	Yes	Yes	Yes