-int res_trav (Res r, const char *prefix, void *p,
- void (*f)(void *p, const char *name, const char *value));
+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);