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Subject: Further thoughts on Party data for 2.3

This morning I got a letter from one of our suppliers saying that their bank details have changed. They were rather disorganized and the letter was dated 1st Nov and in the letter we were asked that all remittances from the 1st should go to the new bank! Quite what would have happened had we sent a payment between then and now is unspecified, and now long the old bank account still exists is likewise unspecified.


Now this not only has relevance to new invoices that we might receive from them, but also to existing ones. By this letter they are changing existing invoices retrospectively. How would that be expressed in UBL? Should the invoices be canceled and reissued - we have some that are not due for payment until the end of March but which we received last month?


The other thing that this letter raises and that seems to be missing from the existing Party data is a valid-from date. There is an issue date on the BusinessCard and DigitalAgreement objects, which I suppose could be used as a valid-from date, but that would the need the description tightening up a bit as the current description and name suggests that in the case above had they been more organized and sent the letter in advance of the change it would have been the letter date rather than the change date.


This brings to mind the whole question of whether the detail of the Party information should really be repeated on every other object, or whether some identifier (in old paper speak an account number) needs to be agreed as part of the DigitalAgreement (and its subsequent revisions possibly by BusinessCard) from then on the other documents only the identifier is given. The receiver then uses the time qualified version of the Party data in the agreement for any actions that need the information in the Party data. By time qualified I mean the most recent version where the valid-from date is less than today.


Now I can hear the response even as I type this. This is subject to the profile and the paper agreement that went with it. In my world there are no paper agreements (and no lawyers). What I am looking for is the right UBL way to do this, if you like some kind of default profile, or at least a narrative describing a suitable and functionally complete approach.



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