1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN"
"http://www.w3.org/TR/REC-html40/strict.dtd">
<html lang=en-us>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>SUP - Superscript</title>
<link rev=Made href="mailto:liam@htmlhelp.com">
<link rel=Start href="../index.html">
<link rel=StyleSheet href="../style.css" type="text/css">
<link rel=StyleSheet href="../aural.css" type="text/css" media=aural>
<meta name="author" content="Liam Quinn">
<meta name="description" content="A description of HTML 4.0's SUP element for superscripts.">
<meta name="keywords" content="sup element, superscript, superscripted, superscripts, text, HyperText Markup Language, HTML, HTML4, HTML 4.0, Web Design Group, WDG, <sup> tag">
</head>
<body>
<h2><img src="../wdglogo1.gif" width=250 height=83 alt="The Web Design Group"></h2>
<h1>SUP - Superscript</h1>
<table>
<tr valign=top>
<th>Syntax</th>
<td><strong class=required><SUP></strong>...<strong class=required></SUP></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>SUP</strong> element is used for <em>superscripts</em>. Since <strong class=html>SUP</strong> is inherently presentational, it should not be relied upon to express a given meaning. However, it can be useful for mathematical exponents where the context implies the meaning of the exponent, as well as other cases where superscript presentation is helpful but not required. For example:</p>
<ul class=example>
<li><code class=html>The rent is due on the 1<SUP>st</SUP> of each month.</code></li>
<li><code class=html>An example of a quadratic polynomial is <STRONG>3<VAR>x</VAR><SUP CLASS=exponent>2</SUP> + 5<VAR>x</VAR> - 7</STRONG>.</code></li>
</ul>
<p>The following two examples are ambiguous when presented on a browser incapable of superscript text:</p>
<ul class=example>
<li><code class=html>2<SUP CLASS=exponent>4</SUP> = 16</code></li>
<li><code class=html>sin<SUP CLASS=exponent>2</SUP><VAR>x</VAR> + cos<SUP CLASS=exponent>2</SUP><VAR>x</VAR> = 1</code></li>
</ul>
<p>There is no simple solution for this problem. One could use notation such as <strong class=html>2^4</strong> to represent "two raised to the exponent four." If it gains browser support, <abbr title="Mathematical Markup Language"><a href="http://www.w3.org/TR/REC-MathML/">MathML</a></abbr> should provide a more suitable solution in the future.</p>
<h2>More Information</h2>
<ul>
<li><a href="http://www.w3.org/TR/REC-html40/struct/text.html#edef-SUP">SUP 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">SUP in <abbr class=initialism title="World Wide Web Consortium">W3C</abbr> HTML3.2 Recommendation</a></li>
<li><a href="../../wilbur/font/sup.html">SUP in <abbr class=initialism title="Web Design Group">WDG</abbr> HTML3.2 Reference</a></li>
<li><a href="http://www.malibutelecom.com/yucca/HTML3.2/5.53.html">SUP in <cite>Learning HTML3.2 by Examples</cite></a></li>
</ul>
<div class=footer>
<address>Maintained by <a href="http://www.htmlhelp.com/%7Eliam/">Liam Quinn</a> <<a href="mailto:liam@htmlhelp.com">liam@htmlhelp.com</a>></address>
<p class=toolbar><img src="../wdglogo-small.gif" width=105 height=40 alt="Web Design Group ~"> <a href="../index.html" rel=Start>HTML4.0Reference</a>~ <a href="../olist.html">ElementsbyFunction</a>~ <a href="../alist.html">ElementsAlphabetically</a></p>
<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>
</div>
</body>
</html>
|
