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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>
<title>DD - Definition Description</title>
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<meta name="description" content="A description of HTML 4.0's DD element for descriptions in a definition list.">
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<h1>DD - Definition Description</h1>
<table>
<tr valign=top>
<th>Syntax</th>
<td><strong class=required><DD></strong>...</DD></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>, <a href="../block.html">block-level elements</a></td>
</tr>
<tr valign=top>
<th>Contained in</th>
<td><a href="dl.html">DL</a></td>
</tr>
</table>
<p>The <strong class=html>DD</strong> element provides the <em>definition</em> of a <a href="dt.html">term</a> in a <a href="dl.html">definition list</a>. The closing tag for <strong class=html>DD</strong> is optional, but its use prevents common browser bugs with <a href="../../css/">style sheets</a>.</p>
<p><strong class=html>DD</strong> may contain <a href="../block.html">block-level elements</a> such as <strong class=html><a href="../block/p.html">P</a></strong>, <strong class=html><a href="../block/h2.html">H2</a></strong>, <strong class=html><a href="../tables/table.html">TABLE</a></strong>, and <strong class=html><a href="dl.html">DL</a></strong>. This allows definition lists to be nested, as in the following example:</p>
<pre class=example><code class=html><DL>
<DT><A NAME="spanning-tree">Spanning tree</A></DT>
<strong><DD></strong>
<P>
A spanning tree of a graph is a <A HREF="#tree">tree</A>
that contains all the vertices of the graph. There are two
main types of spanning trees:
</P>
<DL>
<DT>BFS spanning tree</DT>
<strong><DD></strong>
A spanning tree formed by a breadth-first search on the graph.
<strong></DD></strong>
<DT>DFS spanning tree</DT>
<strong><DD></strong>
A spanning tree formed by a depth-first search on the graph.
<strong></DD></strong>
</DL>
<strong></DD></strong>
<DT><A NAME=tree>Tree</A></DT>
<strong><DD></strong>
<P>
A tree is a connected, undirected graph without cycles.
</P>
<strong></DD></strong>
</DL></code></pre>
<p>A <strong class=html>DD</strong> element should generally be preceded by a <strong class=html><a href="dt.html">DT</a></strong> element that gives the term defined by the <strong class=html>DD</strong>. A single definition term may have multiple definitions associated with it, and a single definition may have multiple terms.</p>
<h2>More Information</h2>
<ul>
<li><a href="http://www.w3.org/TR/REC-html40/struct/lists.html#edef-DD">DD 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#dl">DD in <abbr class=initialism title="World Wide Web Consortium">W3C</abbr> HTML3.2 Recommendation</a></li>
<li><a href="http://www.w3.org/MarkUp/html-spec/html-spec_5.html#SEC5.6.5">DD in HTML2.0 Standard</a></li>
<li><a href="../../wilbur/list/dd.html">DD in <abbr class=initialism title="Web Design Group">WDG</abbr> HTML3.2 Reference</a></li>
<li><a href="http://www.hut.fi/u/jkorpela/HTML3.2/5.17.html">DD 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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