+Indexes
+------------
+
+| Name | Fields |
+| ------------- | -------------- |
+| PRIMARY | id |
+| uid_seen | uid, seen |
+| convid | convid |
+| uri | uri(64) |
+| parent-uri | parent-uri(64) |
+| contactid | contact-id(32) |
+| author-id | author-id |
+| uri-id | uri-id |
+| parent-uri-id | parent-uri-id |
+| thr-parent-id | thr-parent-id |
+
+Foreign Keys
+------------
+
+| Field | Target Table | Target Field |
+|-------|--------------|--------------|
+| uid | [user](help/database/db_user) | uid |
+| author-id | [contact](help/database/db_contact) | id |
+| uri-id | [item-uri](help/database/db_item-uri) | id |
+| parent-uri-id | [item-uri](help/database/db_item-uri) | id |
+| thr-parent-id | [item-uri](help/database/db_item-uri) | id |
+