Parse and submit a cXML PunchOut catalog order for B2B procurement

Steps

1. Initiate a PunchOut Setup Request (cXML PunchOutSetupRequest) to the supplier's PunchOut URL, including your buyer credential (identity + shared secret), the BuyerCookie for session correlation, and the return URL where the cart XML should be posted back.
2. Receive the PunchOutSetupResponse containing a Start Page URL; open or navigate to this URL in a session context to browse the supplier's catalog within the PunchOut frame.
3. After selecting items, the supplier posts a PunchOutOrderMessage cXML document to your return URL; parse the ItemIn elements to extract supplier part numbers, descriptions, unit prices, quantities, and UOM codes.
4. Map the PunchOut cart items into your internal purchase requisition format and route for any required approval workflows before generating a purchase order.
5. Generate and transmit an OrderRequest cXML document to the supplier's order submission endpoint, referencing the original PunchOut session BuyerCookie; sign the request with your shared secret using the cXML HMAC or credential scheme.
6. Capture the OrderResponse, extract the supplier order ID and any line-level confirmations, and store them against the requisition for tracking.