Table notification
===========
+
notifications
-| Field | Description | Type | Null | Key | Default | Extra |
-| ----- | ----------- | ---- | ---- | --- | ------- | ----- |
-| id | sequential ID | int unsigned | YES | PRI | | auto_increment |
-| uid | Owner User id | mediumint unsigned | NO | | | |
-| vid | Id of the verb table entry that contains the activity verbs | smallint unsigned | NO | | | |
-| type | | tinyint unsigned | NO | | | |
-| actor-id | Link to the contact table with uid=0 of the actor that caused the notification | int unsigned | NO | | | |
-| target-uri-id | Item-uri id of the related post | int unsigned | NO | | | |
-| parent-uri-id | Item-uri id of the parent of the related post | int unsigned | NO | | | |
-| created | | datetime | NO | | | |
-| seen | | boolean | NO | | 0 | |
+Fields
+------
+
+| Field | Description | Type | Null | Key | Default | Extra |
+| ------------- | ------------------------------------------------------------------------------ | ------------------ | ---- | --- | ------- | -------------- |
+| 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 | |
+| 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 | |
+| created | | datetime | YES | | NULL | |
+| seen | | boolean | YES | | 0 | |
+
+Indexes
+------------
+
+| Name | Fields |
+| ----------------------------------- | ----------------------------------------------- |
+| PRIMARY | id |
+| uid_vid_type_actor-id_target-uri-id | UNIQUE, uid, vid, type, actor-id, target-uri-id |
+| vid | vid |
+| actor-id | actor-id |
+| target-uri-id | target-uri-id |
+| parent-uri-id | parent-uri-id |
+| seen_uid | seen, uid |
+
+Foreign Keys
+------------
+
+| Field | Target Table | Target Field |
+|-------|--------------|--------------|
+| uid | [user](help/database/db_user) | uid |
+| vid | [verb](help/database/db_verb) | id |
+| actor-id | [contact](help/database/db_contact) | id |
+| target-uri-id | [item-uri](help/database/db_item-uri) | id |
+| parent-uri-id | [item-uri](help/database/db_item-uri) | id |
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