Node
<cac:OrderReference>
<cbc:ID> </cbc:ID>
<cbc:SalesOrderID> </cbc:SalesOrderID>
</cac:OrderReference>
The ID in the Despatch advice message is the purchase order code as determined by the buyer. The SalesOrderID is the sales order code as assigned by the supplier.
In Isah
ID = PurchaseDocument.PurOrdNr
SalesOrderID = Not used in Isah