| id | sequential ID | int unsigned | NO | PRI | NULL | auto_increment |
| uid | Owner User id | mediumint unsigned | YES | | NULL | |
| vid | Id of the verb table entry that contains the activity verbs | smallint unsigned | YES | | NULL | |
-| type | | tinyint unsigned | YES | | NULL | |
+| type | | smallint unsigned | YES | | NULL | |
| actor-id | Link to the contact table with uid=0 of the actor that caused the notification | int unsigned | YES | | NULL | |
| target-uri-id | Item-uri id of the related post | int unsigned | YES | | NULL | |
| parent-uri-id | Item-uri id of the parent of the related post | int unsigned | YES | | NULL | |