+Indexes
+------------
+
+| Name | Fields |
+| --------- | --------- |
+| PRIMARY | uri-id |
+| owner-id | owner-id |
+| author-id | author-id |
+| causer-id | causer-id |
+| received | received |
+| commented | commented |
+
+Foreign Keys
+------------
+
+| Field | Target Table | Target Field |
+|-------|--------------|--------------|
+| uri-id | [item-uri](help/database/db_item-uri) | id |
+| owner-id | [contact](help/database/db_contact) | id |
+| author-id | [contact](help/database/db_contact) | id |
+| causer-id | [contact](help/database/db_contact) | id |
+