* **cache leeren:**
    * function mymodule_init(): admin_menu_flush_cache();
  * **Form: Daten einlesen** - drupal_retrieve_form($form_id, &$form_state) in /include/form.inc
    * $form = call_user_func_array(isset($callback) ? $callback : $form_id, $args);
    * Views.relationship: views_ui_add_item_form($form, &$form_state)
      * $base_tables = $view->get_base_tables();
        * foreach ($this->display_handler->get_handlers('relationship') as $handler) {
          * $base_tables[$handler->definition['base']] = TRUE;
        * }
      * $options = views_fetch_fields(array_keys($base_tables), $type, $display->handler->use_group_by());
        * //in views/includes/admin.inc//
        * $data = views_fetch_data();
          * $cache = module_invoke_all('views_data');
          * foreach: $function = $module . '_views_data_alter'; $function($cache); 
        * foreach ($data as $table => $table_data) {
          * foreach ($table_data as $field => $info) {
            * if ($field == 'table') { ...
            * foreach (array('field', 'sort', 'filter', 'argument', 'relationship', 'area') as $key) {
              *