Stores a record per term per property per language. This table is very similar to / identical to wbt_item_terms, but for properties.

Part of the Item & Property Terms storage system.

Fields:

wbpt_id - an auto increment field
wbpt_property_id - numeric value of the item ID. So P64 # 64
wbpt_term_in_lang_id - reference to the wbt_term_in_lang table

+----------------------+------------------+------+-----+---------+----------------+
| Field                | Type             | Null | Key | Default | Extra          |
+----------------------+------------------+------+-----+---------+----------------+
| wbpt_id              | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| wbpt_property_id     | int(10) unsigned | NO   | MUL | NULL    |                |
| wbpt_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_property_id
wbit_property_id

Example data:

wbpt_id	wbpt_property_id	wbpt_term_in_lang_id
1	9	5678
6	9	1111
7	10	888