How to implement a custom property with several fields in Bitrix?

Question

1C-Bitrix

Good afternoon!
Please tell me how to implement a custom infoblock property with several fields in GetUserTypeDescription.
For example:
Product, Quantity
Product, Quantity
Product, Quantity

Answer 1

If there are exactly 2 fields, you have 2 regular fields available when saving to the database: VALUE, DESCRIPTION- use them
If there are more than 2 fields, when saving to the database, execute serialize()in CIBlockProperty::ConvertToDB()and unserialize()inCIBlockProperty::ConvertFromDB()