public function testCustomeElementHandler()
 {
     $doc = new ezcDocumentDocbook();
     $doc->loadFile(dirname(__FILE__) . '/files/docbook/rst/h_001_address.xml');
     $converter = new ezcDocumentDocbookToRstConverter();
     $converter->setElementHandler('docbook', 'address', new myAddressElementHandler());
     $wiki = $converter->convert($doc);
     $this->assertSame($wiki->save(), file_get_contents(dirname(__FILE__) . '/files/docbook/rst/h_001_address.txt'));
 }
<?php

require 'tutorial_autoload.php';
$docbook = new ezcDocumentDocbook();
$docbook->loadFile('address.xml');
class myAddressElementHandler extends ezcDocumentDocbookToRstBaseHandler
{
    public function handle(ezcDocumentElementVisitorConverter $converter, DOMElement $node, $root)
    {
        $root .= $this->renderDirective('address', $node->textContent, array());
        return $root;
    }
}
$converter = new ezcDocumentDocbookToRstConverter();
$converter->setElementHandler('docbook', 'address', new myAddressElementHandler());
$rst = $converter->convert($docbook);
echo $rst->save();