title: java.lang.IllegalArgumentException: No SchemaFactory that implements the schema language specified
body: <p>I am getting the following exception:</p>
  
  <blockquote>
    <p>java.lang.IllegalArgumentException: No SchemaFactory that implements the schema language specified by: <a href="http://www.w3.org/2001/XMLSchema-instance" rel="noreferrer">http://www.w3.org/2001/XMLSchema-instance</a> could be loaded
        at javax.xml.validation.SchemaFactory.newInstance(SchemaFactory.java:204)
        at MAIN.SchemaImport3.validateXMLSchema(SchemaImport3.java:74)
        at MAIN.SchemaImport3.main(SchemaImport3.java:62)</p>
  </blockquote>
  
  <p>Here is my code:</p>
  
  <pre><code>URL source;
  source = new URL(schemaList.getDocumentBaseURI());
  SchemaFactory factory = SchemaFactory.newInstance(
                           XMLConstants.W3C_XML_SCHEMA_INSTANCE_NS_URI);
  </code></pre>