+Indexes
+------------
+
+| Name | Fields |
+| ------- | ---------------------- |
+| PRIMARY | uri-id, type, tid, cid |
+| tid | tid |
+| cid | cid |
+
+Foreign Keys
+------------
+
+| Field | Target Table | Target Field |
+|-------|--------------|--------------|
+| uri-id | [item-uri](help/database/db_item-uri) | id |
+| tid | [tag](help/database/db_tag) | id |
+| cid | [contact](help/database/db_contact) | id |
+