diff --git a/domain.module b/domain.module
index 8ba8466..b24f60c 100644
--- a/domain.module
+++ b/domain.module
@@ -3918,3 +3918,32 @@ function domain_get_tokens($prefixes = array()) {
   }
   return $tokens;
 }
+
+/**
+ * Implements hook_entity_property_info_alter().
+ *
+ * Adding domain properties.
+ */
+function domain_entity_property_info_alter(&$info) {
+  $properties = &$info['node']['properties'];
+
+  $properties['domain_source'] = array(
+    'label' => t('Domain Source'),
+    'description' => t(''),
+    'type' => 'integer',
+  );
+
+  $properties['domains'] = array(
+    'label' => t('Domains'),
+    'description' => t(''),
+    'type' => 'list<integer>',
+  );
+}
+
+/**
+ * Implements hook_search_api_query_alter().
+ */
+function domain_search_api_query_alter(SearchApiQueryInterface $query) {
+  $domain = domain_get_domain();
+  $query->condition('domains', $domain['domain_id']);
+}