I know of no Perl module that generates an XML document based on an input XSD. There are tools available that do it however (Google;-). I myself use XMLSpy for that. See below for an example generated with XMLSpy (runs under Windows only). Look for oXygen for a platform independent solution, it's cheap and good and has an "XML Instance Generator" too.

<?xml version="1.0" encoding="UTF-8"?>
<!--Sample XML file generated by XMLSPY v2004 rel. 4 U (http://www.xml
+spy.com)-->
<bks:books xmlns:bks="urn:books" xmlns:xsi="http://www.w3.org/2001/XML
+Schema-instance"
      xsi:schemaLocation="urn:books
      theSchema.xsd">
<book id="String">
    <author>String</author>
    <title>String</title>
    <genre>String</genre>
    <price>3.14159</price>
    <pub_date>1967-08-13</pub_date>
    <review>String</review>
</book>
</bks:books>

[download]

The XML file you give is not valid by the way. Error message: "Mandatory ‘pub_date’ element expected in place of ‘review’."

There are many Perl modules to work with XML. With some effort you can write a Perl script that generates a valid XML file out of an XSD.

HTH

UPDATE
Some XIGs (XML Instance Generators):

In reply to Re^3: How to generate XML file from XSDs ? by dHarry
in thread How to generate XML file from XSDs ? by matrixmadhan

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