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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN"
"http://www.w3.org/TR/REC-html40/strict.dtd">
<html lang=en>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>SUB - Subscript</title>
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<meta name="author" content="Liam Quinn">
<meta name="description" content="A description of HTML 4.0's SUB element for subscripts.">
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</head>
<body>
<h2><img src="../wdglogo1.gif" width=250 height=83 alt="The Web Design Group"></h2>
<h1>SUB - Subscript</h1>
<table>
<tr valign=top>
<th>Syntax</th>
<td><strong class=required><SUB></strong>...<strong class=required></SUB></strong></td>
</tr>
<tr valign=top>
<th>Attribute Specifications</th>
<td>
<ul>
<li><a href="../attrs.html">common attributes</a></li>
</ul>
</td>
</tr>
<tr valign=top>
<th>Contents</th>
<td><a href="../inline.html">Inline elements</a></td>
</tr>
<tr valign=top>
<th>Contained in</th>
<td><a href="../inline.html">Inline elements</a>, <a href="../block.html">block-level elements</a></td>
</tr>
</table>
<p>The <strong class=html>SUB</strong> element is used for <em>subscripts</em>. Since <strong class=html>SUB</strong> is inherently presentational, it should not be relied upon to express a given meaning. However, it can be useful for chemical formulas and mathematical indices, where the subscript presentation is helpful but not required. For example:</p>
<ul class=example>
<li><code class=html>Chemical formulas include H<SUB>2</SUB>O (water) and C<SUB>21</SUB>H<SUB>27</sub>NO (methadone).</code></li>
<li><code class=html>Let <VAR>x</VAR> = <VAR>x<SUB>1</SUB></VAR> + <VAR>x<SUB>2</SUB></VAR> + ... + <VAR>x<SUB>n</SUB></VAR>.</code></li>
</ul>
<h2>More Information</h2>
<ul>
<li><a href="http://www.w3.org/TR/REC-html40/struct/text.html#edef-SUB">SUB in <abbr class=initialism title="World Wide Web Consortium">W3C</abbr> HTML4.0 Recommendation</a></li>
<li><a href="http://www.w3.org/TR/REC-html32#font-style">SUB in <abbr class=initialism title="World Wide Web Consortium">W3C</abbr> HTML3.2 Recommendation</a></li>
<li><a href="../../wilbur/font/sub.html">SUB in <abbr class=initialism title="Web Design Group">WDG</abbr> HTML3.2 Reference</a></li>
<li><a href="http://www.malibutelecom.com/yucca/HTML3.2/5.52.html">SUB in <cite>Learning HTML3.2 by Examples</cite></a></li>
</ul>
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<address>Maintained by <a href="http://www.htmlhelp.com/%7Eliam/">Liam Quinn</a> <<a href="mailto:liam@htmlhelp.com">liam@htmlhelp.com</a>></address>
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<p class=copyright>Copyright © 1998 by <a href="http://www.htmlhelp.com/%7Eliam/">Liam Quinn</a>. This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at <a href="http://www.opencontent.org/openpub/">http://www.opencontent.org/openpub/</a>).</p>
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