-int res_trav (Res r, const char *prefix, void *p,
+const char *res_get_def(Res r, const char *name, const char *def);
+
+YAZ_EXPORT
+int res_get_match(Res r, const char *name, const char *value, const char *s);
+
+YAZ_EXPORT
+void res_set(Res r, const char *name, const char *value);
+
+YAZ_EXPORT
+int res_trav(Res r, const char *prefix, void *p,