How to print meta property using custom meta tag module I have implemented the custom meta tag module found here:
http://www.phase2technology.com/blog/creating-custom-meta-tags-with-the-metatag-module/

The following code creates my new meta tag, the problem is that it creates a 

&lt;meta name="my_custom_metatag"&gt; 


tag. 

How can I make it print out a 

&lt;meta property="my_custom_metatag"&gt;


tag instead?

&lt;?php
//
// Implements hook_metatag_info().
//
function my_metatags_metatag_info() {
  $info['groups']['my_metatags'] = array(
    'label' =&gt; t('My Custom Metatags'),
  );

  $info['tags']['my_custom_metatag'] = array(
    'label' =&gt; t('My Custom Meta Tag'),
    'description' =&gt; t('This is a custom meta tag'),
    'class' =&gt; 'DrupalTextMetaTag',
    'group' =&gt; 'my_metatags',
  );

  return $info;
}


Thanks!
Telling your custom meta tag to use the property theme formatter should do the trick.

$info['tags']['my_custom_metatag'] = array(
  'label' =&gt; t('My Custom Meta Tag'),
  'description' =&gt; t('This is a custom meta tag'),
  'class' =&gt; 'DrupalTextMetaTag',
  'group' =&gt; 'my_metatags',
  'element' =&gt; array(
    '#theme' =&gt; 'metatag_property',
  ),
);