01Look up Belgian enterprise (VAT) data from the BCE/KBO database.
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03Verify Peppol participant registration and capabilities for Belgian entities.
04Transform structured invoice data into UBL 2.1 XML format.
05Validate UBL 2.1 e-invoices against Belgian standards (Peppol BIS 3.0, PINT-BE, Mercurius).
06Generate compliant UBL 2.1 Belgian e-invoices from structured data.