rue</code>
if the <code>${deploy}/xmlClasses.jar</code> file is more up-to-date than
any of the DTD files in the <code>${src}/xml</code> directory.</p>
<p>This can be written as:</p>
<pre>  &lt;uptodate property=&quot;xmlBuild.notRequired&quot;&gt;
    &lt;srcfiles dir= &quot;${src}/xml&quot; includes=&quot;**/*.dtd&quot;/&gt;
    &lt;mapper type=&quot;merge&quot; to=&quot;${deploy}\xmlClasses.jar&quot;/&gt;
  &lt;/uptodate&gt;</pre>
as well.

The <code>xmlBuild.notRequired</code> property can then be used 