What arrives carries only what its author thought mattered, and SAP Business One requires several things they never had any reason to think about, so the difference is resolved on the way in.
A tool somewhere in the business sends something out on a timer. It was written by somebody solving their own problem, and it carries what mattered to them, which is not the same as what an ERP requires before it will accept a document. So what arrives is complete by its author's standards and incomplete by SAP Business One's, and the gap is filled by a person who knows which customer code to use and which account it posts to. Connecting JSON and SAP Business One resolves that gap as a rule rather than as somebody's knowledge, so what arrives becomes something the ERP will take.

What is left out is resolved the same way every time rather than by whoever happens to be looking, so the document SAP Business One receives is complete when it arrives.
Which partner code and which account each item maps to is written down rather than held by the one person who has always done it, which matters most in the week they are away.
When something genuinely cannot be resolved, the document is held and the missing part named, so nothing is posted with a default that somebody discovers at a year end.
Nobody has to go back to whoever wrote the emitting tool and ask them to add fields, which is usually the conversation that stops this kind of thing from ever being done.
When the file arrives, Alumio resolves the partner and the accounts it implies and creates the SAP Business One document, so the entry is complete rather than something finance finishes off by hand each morning.
When what arrives names somebody SAP Business One does not hold, Alumio applies the rule you set rather than creating a new one each time, so the ledger does not fill with near-duplicate partners nobody reconciles.
When a required value is missing and cannot be derived, the document is held with that value named, so somebody supplies it once rather than the entry being posted to a default and unpicked at the following year end.
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The tool sending this is rarely the only one. Most businesses that have one have three, each written by a different person at a different time, and each producing something slightly different. Alumio holds those alongside this one, so the resolving rules are shared rather than rebuilt for every emitter somebody discovers is still running.
Yes, and what arrives is rarely enough on its own, so the useful part is what gets added before the document is created. Alumio resolves partners, accounts and item codes from what you configure, then creates the document with those in place. What can be created is whatever SAP Business One exposes for it, which is worth confirming first.
No, and what the configuration actually holds is the interesting part: the rules that turn something incomplete into a valid document. That is knowledge somebody currently carries in their head, and writing it down is most of the value here. Where a value has to be derived from several parts of what arrives, the Code Transformer derives it.
Usually the accounting, because the tool that emitted it was not written by anybody who thinks about ledgers. A partner code, a posting account, a currency and a tax treatment are ordinary requirements for a document and invisible requirements for an application that was solving a different problem. Naming which of those can be derived and which has to be supplied is the design of this.
The one that surfaces late is a document created from something incomplete, because it posted and looked ordinary. Alumio names the value the ERP required and did not get, so the correction is one document rather than a period. Each load is monitored live and logged with what it carried, a refusal alerts with the reason, retries run where configured, and nothing is lost silently.
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