diff --git a/features.api.php b/features.api.php
index f7e9a5e..ef16b31 100644
--- a/features.api.php
+++ b/features.api.php
@@ -147,6 +147,11 @@ function hook_features_export_options() {
  *   An associative array of rendered PHP code where the key is the name of the
  *   hook that should wrap the PHP code. The hook should not include the name
  *   of the module, e.g. the key for `hook_example` should simply be `example`.
+ *   The value will most likely be a string-representation of an associative
+ *   array, that holds the values to export. The keys of that array should be
+ *   the same as in the hook_features_export_options(), so already exported
+ *   components could be mapped and are hidden in feature creation view.
+ *   @see features_get_default_map().
  */
 function hook_features_export_render($module_name, $data, $export = NULL) {
   $code = array();