This is a text description of maptlbar.gif.
<p>This figure shows the mapping toolbar, consisting of the following buttons:</p>
<p><b>Mappings</b></p>
<ul>
  <li>Direct-to-field</li>
  <li>One-to-one</li>
  <li>Variable one-to-one</li>
  <li>One-to-many</li>
  <li>Many-to-many</li>
  <li>Object-type</li>
  <li>Aggregate</li>
  <li>Direct collection</li>
  <li>Transformation</li>
  <li>Type conversion</li>
  <li>Serialized</li>
  <li>Unmapped</li>
</ul>
<p><b>Descriptors</b></p>
<ul>
  <li>EJB descriptor</li>
  <li>Class descriptor</li>
  <li>Aggregate descriptor</li>
</ul>