| author-id_uid | author-id, uid |
| author-id_received | author-id, received |
| parent-uri-id_uid | parent-uri-id, uid |
+| uid_wall_received | uid, wall, received |
| uid_contactid | uid, contact-id |
| uid_unseen_contactid | uid, unseen, contact-id |
| uid_unseen | uid, unseen |