--- /dev/null
+<?php
+
+namespace Drupal\ctools\Annotation;
+
+use Drupal\Component\Annotation\Plugin;
+
+/**
+ * Defines a Relationship item annotation object.
+ *
+ * @see \Drupal\ctools\Plugin\RelationshipManager
+ * @see plugin_api
+ *
+ * @Annotation
+ */
+class Relationship extends Plugin {
+
+ /**
+ * The plugin ID.
+ *
+ * @var string
+ */
+ public $id;
+
+ /**
+ * The label of the plugin.
+ *
+ * @var \Drupal\Core\Annotation\Translation
+ *
+ * @ingroup plugin_translatable
+ */
+ public $label;
+
+ /**
+ * The returned data type of this relationship
+ *
+ * @var string
+ */
+ public $data_type;
+
+ /**
+ * The name of the property from which this relationship is derived.
+ *
+ * @var string
+ */
+ public $property_name;
+
+ /**
+ * The array of contexts requires or optional for this plugin.
+ *
+ * @var \Drupal\Core\Plugin\Context\ContextInterface[]
+ */
+ public $context;
+
+}