+/* Free recursively a tree of attributes. All contained gobject of type
+ LttvAttribute are freed (unreferenced) recursively. */
+
+void lttv_attribute_recursive_free(LttvAttribute *self);
+
+/* Add items from a tree of attributes to another tree. */
+
+void lttv_attribute_recursive_add(LttvAttribute *dest, LttvAttribute *src);
+