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<title>XML DOM - Nodes</title>
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<p>From <b>http://www.w3schools.com</b> (Copyright Refsnes Data)</p>
<h1>XML DOM Nodes</h1>
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<p class="intro">In the DOM, everything in an XML document is a node.</p>
<hr />
<h2>DOM Nodes</h2>
<p>According to the DOM, everything in an XML document is a <b>node</b>.</p>
<p>The DOM says:</p>
<ul>
<li>The
entire document is a document node</li>
<li>Every XML element is an element node</li>
<li>The text in the XML elements are text
nodes</li>
<li>Every attribute is an attribute node</li>
<li>Comments are comment nodes</li>
</ul>
<hr />
<h2>DOM Example</h2>
<p>Look at the following XML file (<a target="_blank" href="books.xml">books.xml</a>):</p>
<table width="100%" border="1" class="ex" cellspacing="0" id="table17">
<tr>
<td>
<pre><?xml version="1.0" encoding="ISO-8859-1"?>
<bookstore>
<book category="cooking">
<title lang="en">Everyday Italian</title>
<author>Giada De Laurentiis</author>
<year>2005</year>
<price>30.00</price>
</book>
<book category="children">
<title lang="en">Harry Potter</title>
<author>J K. Rowling</author>
<year>2005</year>
<price>29.99</price>
</book>
<book category="web">
<title lang="en">XQuery Kick Start</title>
<author>James McGovern</author>
<author>Per Bothner</author>
<author>Kurt Cagle</author>
<author>James Linn</author>
<author>Vaidyanathan Nagarajan</author>
<year>2003</year>
<price>49.99</price>
</book>
<book category="web" cover="paperback">
<title lang="en">Learning XML</title>
<author>Erik T. Ray</author>
<year>2003</year>
<price>39.95</price>
</book>
</bookstore></pre>
</td>
</tr>
</table>
<p>The root node in the XML above is named <bookstore>. All other nodes in the
document
are contained within <bookstore>.</p>
<p>The root node <bookstore> holds four <book> nodes.</p>
<p>The first <book> node holds four nodes: <title>, <author>, <year>, and
<price>, which contains one text node each, "Everyday Italian", "Giada
De Laurentiis", "2005", and
"30.00".</p>
<hr />
<h2>Text is Always Stored in Text Nodes</h2>
<p>A common error in DOM processing is
to expect an element node to contain text. </p>
<p>However, the text of an element node is stored in a text node.</p>
<p>In this example: <b><year>2005</year></b>, the element node
<year>, holds a
text node with the value "2005". </p>
<p>"2005" is <b>not</b> the value of the <year> element!</p>
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