Stores a record per term per item per language. This table is expected to be the tallest in this group of tables. This table is very similar to / identical to wbt_property_terms, but for items.

Part of the md_docs_storage_terms storage system.

Fields:

wbit_id - an auto increment field
wbit_item_id - numeric value of the item ID. So Q64 # 64
wbit_term_in_lang_id - reference to the wbt_term_in_lang table

+----------------------+---------------------+------+-----+---------+----------------+
| Field                | Type                | Null | Key | Default | Extra          |
+----------------------+---------------------+------+-----+---------+----------------+
| wbit_id              | bigint(20) unsigned | NO   | PRI | NULL    | auto_increment |
| wbit_item_id         | int(10) unsigned    | NO   | MUL | NULL    |                |
| wbit_term_in_lang_id | int(10) unsigned    | NO   | MUL | NULL    |                |
+----------------------+---------------------+------+-----+---------+----------------+

Using an integer to represent the item identifier was a design decision allowing for smaller tables and faster querying.

Extra Indexes:

UNIQUE wbit_term_in_lang, wbit_item_id
wbit_item_id

Example data:

wbit_id	wbit_item_id	wbit_term_in_lang_id
1	99	5678
2	99	1111
3	12	4533