$res_list->find({pred1=>$val1})
==
FOREACH $res
  $res->meets_proplim({pred1=>$val1})

---

$res->meets_proplim({pred1=>$val1})
==
$res->has_value({pred1=>$val1})
==
FOREACH $arc IN $res->arclist($pred1)
  $arc->value_equals($val1)

---