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<h1>XPath Examples</h1>
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<p class="intro">Let's try to learn some basic XPath syntax by looking at some examples.</p>
<hr />
<h2>The XML Example Document</h2>
<p>We will use the following XML document in the examples below.</p>
<p>"books.xml":</p>
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<pre><?xml version="1.0" encoding="ISO-8859-1"?></pre>
<pre><bookstore></pre>
<pre><book category="COOKING">
<title lang="en">Everyday Italian</title>
<author>Giada De Laurentiis</author>
<year>2005</year>
<price>30.00</price>
</book></pre>
<pre><book category="CHILDREN">
<title lang="en">Harry Potter</title>
<author>J K. Rowling</author>
<year>2005</year>
<price>29.99</price>
</book></pre>
<pre><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></pre>
<pre><book category="WEB">
<title lang="en">Learning XML</title>
<author>Erik T. Ray</author>
<year>2003</year>
<price>39.95</price>
</book></pre>
<pre></bookstore></pre>
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<p><a target="_blank" href="books.xml">View the "books.xml" file in your browser</a>.</p>
<hr />
<h2>Selecting Nodes</h2>
<p>Unfortunately, there are different ways of dealing with XML and XPath in
Internet Explorer based browsers and other browsers (like Mozilla based
browsers).</p>
<p>In our examples we have included code that should work with most major
browsers.</p>
<h2>Select nodes for Internet Explorer based browsers</h2>
<p>Using the Microsoft XMLDOM object to load the XML document and the
selectNodes() method to select nodes from the XML document:</p>
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<pre>xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
xmlDoc.async=false;
xmlDoc.load("books.xml");</pre>
<pre>xmlDoc.selectNodes(<i>xpath</i>);</pre>
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<h2>Select nodes for other browsers</h2>
<p>Using the implementation() method of the document object to load the XML document and the
evaluate() method to select nodes from the XML document:</p>
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<pre>xmlDoc=document.implementation.createDocument("","",null);
xmlDoc.async=false;
xmlDoc.load("books.xml");</pre>
<pre>document.evaluate(<i>xpath</i>, xmlDoc, null, XPathResult.ANY_TYPE,null);</pre>
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<hr />
<h2>Select titles from all book Nodes</h2>
<p>The following path syntax selects all the title nodes:</p>
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<td>
<pre>/bookstore/book/title</pre>
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<p><a target="_blank" href="tryit.asp@filename=try_xpath_select_cdnodes">
Try it yourself</a>.</p>
<hr />
<h2>Select the title of the first book Node</h2>
<p>The following path syntax selects only the title of the first book node under the bookstore
element:</p>
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<td>
<pre>/bookstore/book[1]/title</pre>
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<p><a target="_blank" href="tryit.asp@filename=try_xpath_select_cdnodes_first">
Try it yourself</a></p>
<p>There is a problem with this. The example above shows different results in IE
and other browsers.</p>
<p>IE5 and later has implemented that [0] should be the first node,
but according to the W3C standard it should have been [1]!!</p>
<h3>A Workaround!</h3>
<p>To solve the [0] and [1] problem in IE5+, you can set the SelectionLanguage
to XPath.</p>
<p>The following path syntax selects only the title of the first book node under the bookstore
element:</p>
<table width="100%" border="1" class="ex" cellspacing="0" id="table2">
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<td>
<pre><i>xml</i>.setProperty("SelectionLanguage","XPath");
<i>xml</i>.selectNodes("/bookstore/book[1]/title");</pre>
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