node->set_property (X_("id"), (*i).unique_id);
node->set_property (X_("tags"), (*i).tags);
node->set_property (X_("name"), (*i).name);
node->set_property (X_("id"), (*i).unique_id);
node->set_property (X_("tags"), (*i).tags);
node->set_property (X_("name"), (*i).name);