tyle="white-space: normal">primitive_type</code>
  <li>else assign <code style="white-space: normal">object_class_info</code>
</ul>
That is, for most user defined types, objects will be serialized along with
class version information. This will permit one to maintain backward
compatibility with archives which contain previous versions.  However, with this 
ability comes a small runtime cost.  For types whose definition will "never" 
change, efficiency can be gained by specifying <code style="white-space: no