Open Graph Protocol with Zend Framework

I dicided to use Open Graph Protocol in my Web Application using Zend Framewrok.

I found Prograeference Guide here.

http://framework.zend.com/manual/1.11/en/zend.view.helpers.html

First, in Layout Script, 

<?php echo $this->doctype('XHTML1_RDFA');?>

<?= $this->headMeta() ?>

Next, in View Script,you should do like this

$this->doctype('XHTML1_RDFA');

$this->headMeta()->setProperty('og:title','example');

$this->headMeta()->setProperty('og:type', 'website');