--- /dev/null
+<?php
+/**
+ * @file
+ * Contains \Drupal\metatag_mobile\Plugin\metatag\Tag\IosAppLinkAlternative.
+ */
+
+namespace Drupal\metatag_mobile\Plugin\metatag\Tag;
+
+use Drupal\metatag\Plugin\metatag\Tag\LinkRelBase;
+
+/**
+ * The iOS App link alternative for Apple mobile metatag.
+ *
+ * @MetatagTag(
+ * id = "ios_app_link_alternative",
+ * label = @Translation("iOS app link alternative"),
+ * description = @Translation("A custom string for deeplinking to an iOS mobile app. Should be in the format 'itunes_id/scheme/host_path', e.g. 123456/example/hello-screen'. The 'ios-app://' prefix will be included automatically."),
+ * name = "alternate",
+ * group = "apple_mobile",
+ * weight = 91,
+ * type = "uri",
+ * secure = FALSE,
+ * multiple = FALSE
+ * )
+ */
+class IosAppLinkAlternative extends LinkRelBase {
+ // Nothing here yet. Just a placeholder class for a plugin.
+}