| --------------------- | -------------------------------------------------------- | ----------------- | ---- | --- | ------------------- | ----- |
| cid | contact the related contact had interacted with | int unsigned | NO | PRI | 0 | |
| relation-cid | related contact who had interacted with the contact | int unsigned | NO | PRI | 0 | |
-| last-interaction | Date of the last interaction | datetime | NO | | 0001-01-01 00:00:00 | |
+| last-interaction | Date of the last interaction by relation-cid on cid | datetime | NO | | 0001-01-01 00:00:00 | |
| follow-updated | Date of the last update of the contact relationship | datetime | NO | | 0001-01-01 00:00:00 | |
-| follows | | boolean | NO | | 0 | |
+| follows | if true, relation-cid follows cid | boolean | NO | | 0 | |
| score | score for interactions of cid on relation-cid | smallint unsigned | YES | | NULL | |
| relation-score | score for interactions of relation-cid on cid | smallint unsigned | YES | | NULL | |
| thread-score | score for interactions of cid on threads of relation-cid | smallint unsigned | YES | | NULL | |