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Subject: [ubl-lcsc] Document instance UUID
Should we add a placeholder for UUID (Universally Unique IDentifier) definition to all 7 document types? These UUIDs are meta data perculiar to the document instance (not the document type), and are generated by UBL-processors at the point when the document instance is created. Independent ERP/MRP/DP systems may have their own system of issuing serial IDs, but there is no guarantee that the IDs will be unique across other systems, companies, countries. The UUIDs offer characteristics that allow such purposes as document instance "equality test", indexing and tracking, to be carried out in a more well-defined manner. In addition, using UUIDs, we might also then distinguish between document duplicates (different UUID but everything else may be the same values) and repeated sends (same UUID used in the files) of the same document. For instance, in real life, duplicates might need to be sent by administrators due to various transport reasons (or others) such as file received corrupted/incomplete, interim network disruption/failure, etc. Repeated sends might be initiated by business managers and have business implications as they could mean genuine reminders or a contractual obligation to send reminders prior to taking some business actions. Regards, Chin Chee-Kai SoftML
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