title: Validating jdoconfig with incorrect url
body: <p>I am using jdo and configuring the persistence manager with jdoconfig.xml</p>
  
  <p>However everywhere I find documentation about jdoconfig.xml it states that <a href="http://java.sun.com/xml/ns/jdo/jdoconfig" rel="noreferrer">http://java.sun.com/xml/ns/jdo/jdoconfig</a> should be used for validation.</p>
  
  <pre><code>&lt;jdoconfig xmlns="http://java.sun.com/xml/ns/jdo/jdoconfig"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:noNamespaceSchemaLocation="http://java.sun.com/xml/ns/jdo/jdoconfig"&gt;
  etc
  </code></pre>
  
  <p>This url points to a nonexistent file and my xml validator reports an error. 
  What is the purpose of even using this, can we ever trust that the urls will not change and all our xml files all of a sudden stops validating? </p>
  
  <p>Does anyone know the new url?</p>