materio-base-d7/sites/all/modules/contrib/seo/metatag/metatag_google_plus

Metatag: Google+
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This module adds support for meta tag configuration for Google+ Snippet [1].

The following Google+ tags are provided:

* itemprop:name
* itemprop:description
* itemprop:image

Also itemtype is provided to add schema in the HTML markup as follows:




Usage
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Page type (itemtype) provides default type options from the Google+ Snippet page
[1]; to add other types either install select_or_other module [2] or use the
Metatag hooks (see metatag.api.php).


Known Issues
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- When using Zen or its derived theme, the RDF Namespaces will be serialized
into an RDFa 1.1 prefix attribute, which means itemtype will be included in
prefix="...". To avoid this problem, this module will not add a itemtype
directly to $variable['rdf_namespaces'], instead, it will be necessary to add
code manually in the template.php or the custom theme.

Example code to use and adapt as needed:

/**
* Implements template_preprocess_html().
*
* Add itemtype code for Google+ in the 'html_attributes_array' which is only
* available in Zen theme. Note Zen will convert rdf_namespaces to RDFa 1.1 with
* prefix, so putting itemtype there will cause it to be added to the
* prefix="itemtype=..." attribute.
*
* @see zen_preprocess_html()
*/
function MYTHEME_preprocess_html(&$variables, $hook) {
if (module_exists('metatag_google_plus') && isset($variables['itemtype'])) {
$variables['html_attributes_array']['itemscope itemtype'] = "http://schema.org/{$variables['itemtype']}";
}
}


Credits / Contact
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Originally developed by Eric Chen [3] and sponsored by Monkii [4].


References
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1: https://developers.google.com/+/web/snippet/
2. https://drupal.org/project/select_or_other
3: https://drupal.org/user/265729
4: http://monkii.com