ava class representing the
 complex type definition containing the schema element declaration.
 </p>

 <p>There is a property constraint that if <b><code>value</code></b> is <code>null</code>,
 then <code>nil</code> must be <code>true</code>. The converse is not true to enable
 representing a nil element with attribute(s). If <code>nil</code> is true, it is possible
 that <code>value</code> is non-null so it can hold the value of the attributes
 associated with a nil element.
 </p></div>
<dl>
<dt><span clas