<https://developer.woocommerce.com/#/schema/person/image/>
<http://schema.org/contentUrl>
<https://secure.gravatar.com/avatar/a64c4a50f3f38f02cd27a9bfb3f11b62?s=96&d=identicon&r=g>
<https://developer.woocommerce.com/2013/03/11/editing-product-data-tabs/>