--- /dev/null
+<?php
+
+namespace Drupal\metatag_twitter_cards\Plugin\metatag\Tag;
+
+use Drupal\metatag\Plugin\metatag\Tag\MetaNameBase;
+
+/**
+ * The Twitter Cards site's page url metatag.
+ *
+ * @MetatagTag(
+ * id = "twitter_cards_page_url",
+ * label = @Translation("Page URL"),
+ * description = @Translation("The permalink / canonical URL of the current page."),
+ * name = "twitter:url",
+ * group = "twitter_cards",
+ * weight = 6,
+ * type = "uri",
+ * secure = FALSE,
+ * multiple = FALSE
+ * )
+ */
+class TwitterCardsPageUrl extends MetaNameBase {
+}