+#define TYPE_VOID registry_getvoidclass()
+#define TYPE_IS_VOID(t) ((t) == registry_getvoidclass())
+#define TYPE_XML registry_getxmlclass()
+#define TYPE_IS_XML(t) ((t) == registry_getxmlclass())
+#define TYPE_XMLLIST registry_getxmllistclass()
+#define TYPE_IS_XMLLIST(t) ((t) == registry_getxmllistclass())