code: public static Document parseXmlStringWithXsdValidation(String _xmlStr, boolean _namespaceAware) throws IOException  {
          return parseXmlStringWithXsdValidation(_xmlStr, _namespaceAware, null);
      }
docs: Loads XML from string and uses referenced XSD to validate the content.
  This method will use {@link XmlErrorHandlerQuiet} to suppress all errors/warnings when validating.
  
  @param _xmlStr string to validate
  @param _namespaceAware take care of namespace
  @return Document
  @throws IOException on error