mysql> describe discussiontools_item_revisions;
+---------------------+---------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------------+---------------------+------+-----+---------+----------------+
| itr_id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| itr_itemid_id | int(11) | NO | MUL | NULL | |
| itr_revision_id | bigint(20) unsigned | NO | MUL | NULL | |
| itr_items_id | int(11) | NO | | NULL | |
| itr_parent_id | int(11) | YES | | NULL | |
| itr_transcludedfrom | bigint(20) unsigned | YES | | NULL | |
| itr_level | tinyint(4) | NO | | NULL | |
| itr_headinglevel | tinyint(4) | YES | | NULL | |
+---------------------+---------------------+------+-----+---------+----------------+
