Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/rdf/src/SchemaOrgDataConverter.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * @file
+ * Contains \Drupal\rdf\SchemaOrgDataConverter.
+ */
+
+namespace Drupal\rdf;
+
+class SchemaOrgDataConverter {
+
+  /**
+   * Converts an interaction count to a string with the interaction type.
+   *
+   * Schema.org defines a number of different interaction types.
+   *
+   * @param int $count
+   *   The interaction count.
+   * @param array $arguments
+   *   An array of arguments defined in the mapping.
+   *   Expected keys are:
+   *     - interaction_type: The string to use for the type of interaction
+   *       (e.g. UserComments).
+   *
+   * @return string
+   *   The formatted string.
+   *
+   * @see http://schema.org/UserInteraction
+   */
+  static function interactionCount($count, $arguments) {
+    $interaction_type = $arguments['interaction_type'];
+    return "$interaction_type:$count";
+  }
+}