--- /dev/null
+<?php
+
+namespace Drupal\metatag_dc\Plugin\metatag\Tag;
+
+use Drupal\metatag\Plugin\metatag\Tag\MetaNameBase;
+
+/**
+ * The Dublin Core "Identifier" meta tag.
+ *
+ * @MetatagTag(
+ * id = "dcterms_identifier",
+ * label = @Translation("Identifier"),
+ * description = @Translation("An unambiguous reference to the resource within a given context. Recommended best practice is to identify the resource by means of a string conforming to a formal identification system."),
+ * name = "dcterms.identifier",
+ * group = "dublin_core",
+ * weight = 10,
+ * type = "label",
+ * secure = FALSE,
+ * multiple = FALSE
+ * )
+ */
+class Identifier extends MetaNameBase {
+ // Nothing here yet. Just a placeholder class for a plugin.
+}