A purchase information record (PIR) is a record that holds purchase information about a product. It contains information about the purchasable product, such as the supplier, brand, pricing order, quantity, Tax/VAT rate etc.

You can only purchase a product if it has a PIR.
If a PIR is created for a product, it is automatically marked as Can be purchased? = Yes. If you change the setting to No, a warning message appears stating that the purchase information will be removed.
You can have multiple PIRs for a single product, if it is supplied by more than one vendor.
If a product is deleted from the catalog, the related PIRs are also deleted.

If a product or vendor is archived / de-archived, the related purchase information is also archived / de-archived automatically, in order to prevent it from being used.