* - is_valid: "1" if %1 identifies an actual record; otherwise "0"
* - entity_table: NULL or the name of a related table
* - entity_id: NULL or the ID of a row in the related table
* - is_valid: "1" if %1 identifies an actual record; otherwise "0"
* - entity_table: NULL or the name of a related table
* - entity_id: NULL or the ID of a row in the related table