EDI 846 (Inventory Inquiry/Advice) is an X12 transaction set to provide inventory information by a seller to a buyer, by a representative of a seller to that seller, and by one location to another location that is managing goods or services. It is also used to inquire about the availability of inventory without any obligations on the seller to reserve that inventory.

EDI 850 (Purchase Order) is an X12 transaction set to place a purchase order for goods or services with a vendor as per customary and established business and industry practice.

EDI 856 (Shipment/Manifest) is an X12 transaction set to send a list of contents of an order with additional information relating to the shipment. It includes information such as item name, description, characteristics, packaging type, carrier information, and equipment and configurations for the item for transportation. It helps the sender to describe the item and arrange a suitable shipment.