The next query also uses an input document named "prices.xml":
<?xml version="1.0"?>
<prices>
<book>
<title>Advanced Programming in the Unix Environment</title>
<source>www.amazon.com</source>
<price>65.95</price>
</book>
<book>
<title>Advanced Programming in the Unix Environment</title>
<source>www.bn.com</source>
<price>65.95</price>
</book>
<book>
<title>TCP/IP Illustrated</title>
<source>www.amazon.com</source>
<price>65.95</price>
</book>
<book>
<title>TCP/IP Illustrated</title>
<source>www.bn.com</source>
<price>65.95</price>
</book>
<book>
<title>Data on the Web</title>
<source>www.amazon.com</source>
<price>34.95</price>
</book>
<book>
<title>Data on the Web</title>
<source>www.bn.com</source>
<price>39.95</price>
</book>
</prices>
Adapted from XML Query Use Cases