notifications
+Fields
+------
+
| Field | Description | Type | Null | Key | Default | Extra |
| ------------- | ------------------------------------------------------------------------------ | ------------------ | ---- | --- | ------- | -------------- |
| id | sequential ID | int unsigned | NO | PRI | NULL | auto_increment |
| 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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