M
Mike Fechner
Guest
You should also read about Business Tasks (or Business Services as Peter referes to them here). The case sounds to me that with "yourself", customer, items, etc. there may be a few business entities which manage sub-sets of the data. The business tasks might provide the overall logic - and knows how to retrieve some bits first and then use keys of that data to retrieve the rest of the data. Also the business task could be used to transform that data from your internal view to the Mexican standard electronic bill structure.
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