Validation layers: schema, business and receiver rules

Three gates in order, what each one catches, and why passing one gate does not guarantee passing the next. Validation layers is best approached through gates in order. For validation layers, the gate that failed decides the outcome. For validation layers, the gate that failed missing means rejection. For validation layers, the gate that failed wrongly mapped means wrong meaning. This guide keeps returning to one check for validation layers: name the gate that failed.

The route stage for validation layers is Validate. At Validate, the gate that failed is what follows next. For validation layers, a Validate decision cannot be repaired later. For validation layers, a Validate decision cannot be repaired cheaply. Check the gate that failed for validation layers before moving on.

Follow the invoice as a record through validation layers. At Validate, the record for validation layers carries the gate that failed. Answer the gate that failed for validation layers with evidence. Then the rest of validation, errors and corrections becomes easier. Then the rest of validation layers becomes easier to check.

Describe the record before the system for validation layers. Systems change, but the gate that failed for validation layers stays. Providers change, but the gate that failed for validation layers stays. Formats change, but the gate that failed for validation layers stays. For validation layers, ask what record a system produces. For validation layers, ask what record a system accepts. For validation layers, ask what status evidence it returns.

The data that matters most for validation layers is the gate that failed. That is not a slogan for validation layers. It is what the next validation layers check looks at. If the gate that failed for validation layers is missing, expect rejection. If the gate that failed for validation layers is ambiguous, expect rejection. If the gate that failed for validation layers is wrongly formatted, expect rejection.

Check the gate that failed as the receiver reads validation layers. For validation layers, screen correctness is not enough. For validation layers, file correctness is not enough. For validation layers, mapping correctness matters too. Use the mapping table for validation layers first. Use the receiver test for validation layers second. Use a sample invoice for validation layers third.

For validation layers, validation has three gates. Validation layers structure comes first. Validation layers business rules come second. Validation layers receiver rules come third. Each validation layers gate has its own failure message.

A validation layers rejection should name its rule. A validation layers rejection should name its field. A validation layers rejection should name the value sent. A validation layers rejection should name the value expected. Without those facts, a validation layers rejection is a delay. Return a validation layers rejection with that request.

Evidence for validation layers is what remains afterwards. Keep the validation layers invoice as exchanged. Keep validation layers status messages with it. Keep any validation layers correction linked to it. An auditor for validation layers asks for that set.

The common validation layers break is simple. For validation layers, name the gate that failed was skipped. For validation layers, the receiver found the problem. For validation layers, the sender must now correct it. For validation layers, the sender must resend it. For validation layers, the sender must explain it.

Illustration, with round numbers only, for validation layers: A seller sends 20 invoices for validation layers. 2 fail on the gate that failed for validation layers. Checking the gate that failed first for validation layers costs minutes. A validation layers receiver rejection costs days. Sometimes a validation layers rejection costs a payment cycle. That is why validation layers repeats one check: name the gate that failed.

Before acting on validation layers, verify three things. First, jurisdiction and transaction for validation layers. First, buyer and country for validation layers. Second, OpenPeppol: Billing validation rules for validation layers today. Third, the validation layers buyer requirement in writing.

A guide on validation layers organises those questions. A guide on validation layers cannot answer a specific transaction. This guide on validation layers gives general information only. This guide on validation layers is not advice for a specific invoice. For a specific invoice about validation layers, check OpenPeppol: Billing validation rules. For a specific question about validation layers, ask a qualified adviser.