3 namespace Drupal\metatag_open_graph\Plugin\metatag\Tag;
5 use Drupal\metatag\Plugin\metatag\Tag\MetaPropertyBase;
8 * The Open Graph "Book author" meta tag.
12 * label = @Translation("Book author"),
13 * description = @Translation("Links a book to an author's Facebook profile, should be either URLs to the author's profile page or their Facebook profile IDs."),
14 * name = "book:author",
15 * group = "open_graph",
22 class BookAuthor extends MetaPropertyBase {
23 // Nothing here yet. Just a placeholder class for a plugin.