   <li> A list of known subclasses. </li>
    <li> A description of the class. </li>
    <li> A summary of the methods defined by the class. </li>
    <li> A summary of the instance variables defined by the class. </li>
    <li> A summary of the class (static) variables defined by the
    class. </li> 
    <li> A detailed description of each method defined by the
    class. </li>
    <li> A detailed description of each instance variable defined by the
    class. </li> 
    <li> A detailed description of eac