I have a need to create an X12 810 document implementation in order to receive invoices from my customer. I have certain fields that I need like: ShipNumber, ShipmentNumbers, and ProjectCode that exist on the invoice header level. There are also fields like ExpenseType that exist on invoice detail level. In the document that I hand off to the customer it would be correct to say BIG09 should be shipnumber and can be 10 characters long? Or YNQ07 will be ProjectCode and can only be values x,y,z?
I just want to know how do I express the data I need on an X12 810 document? I'm confused because when I look at other companies X12 810 implementation I don't see how I can ask for what I need