I have read the book now. Worked the appendix.
Love the book. I need to do it again so the concepts sink in.
I am guessing the example of a sales order works the same way as a P.O. etc.
I used a field called external ID for my account number.
Its part of the group record so easy to get to.
I am going to add EDI info (like FTP, or service, details to connect like URL etc).
I am going to link that to the supplier (I already did my own front end for the supplier and P.O.).
Great Book.
Joel Fradkin