-| Field | Description | Type | Null | Key | Default | Extra |
-| ----- | ----------- | ---- | ---- | --- | ------- | ----- |
-| cid | contact the related contact had interacted with | int unsigned | YES | PRI | 0 | |
-| relation-cid | related contact who had interacted with the contact | int unsigned | YES | PRI | 0 | |
-| last-interaction | Date of the last interaction | datetime | YES | | 0001-01-01 00:00:00 | |
-| follow-updated | Date of the last update of the contact relationship | datetime | YES | | 0001-01-01 00:00:00 | |
-| follows | | boolean | YES | | 0 | |
+Fields
+------
+
+| Field | Description | Type | Null | Key | Default | Extra |
+| ---------------- | --------------------------------------------------- | ------------ | ---- | --- | ------------------- | ----- |
+| 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 | |
+| follow-updated | Date of the last update of the contact relationship | datetime | NO | | 0001-01-01 00:00:00 | |
+| follows | | boolean | NO | | 0 | |
+
+Indexes
+------------
+
+| Name | Fields |
+| ------------ | ----------------- |
+| PRIMARY | cid, relation-cid |
+| relation-cid | relation-cid |
+
+Foreign Keys
+------------
+
+| Field | Target Table | Target Field |
+|-------|--------------|--------------|
+| cid | [contact](help/database/db_contact) | id |
+| relation-cid | [contact](help/database/db_contact) | id |