--- /dev/null
+<?php
+
+namespace Drupal\metatag\Plugin\metatag\Tag;
+
+/**
+ * Provides a plugin for the 'canonical' meta tag.
+ *
+ * @MetatagTag(
+ * id = "canonical_url",
+ * label = @Translation("Canonical URL"),
+ * description = @Translation("Preferred page location or URL to help eliminate duplicate content for search engines."),
+ * name = "canonical",
+ * group = "advanced",
+ * weight = 1,
+ * type = "uri",
+ * secure = FALSE,
+ * multiple = FALSE
+ * )
+ */
+class CanonicalUrl extends LinkRelBase {
+ // Nothing here yet. Just a placeholder class for a plugin.
+}