elements:
 <ul> 
   <li>package</li>
 </ul>

 <p>
 This is a package level annotation and follows the recommendations
 and restrictions contained in JSR 175, section III, "Annotations".
 Thus the usage is subject to the following constraints and
 recommendations.
 <ul>
   <li> There can only be one package declaration as noted in JSR
        175, section III, "Annotations". </li>
   <li> JSR 175 recommends package-info.java for package level
        annotations. JAXB Providers that follow this recommendatio