Kamer Ozkan

Offline structural and deterministic content preflight for FPA12, FPR12, and FSM10 XML with pinned derived schemas and structured findings. Italian e-invoicing preflight before SDI submission: catches technical errors that commonly cause an SDI scarto, without claiming SDI acceptance.

Peppol BIS Billing validator for UBL invoice XML and EN 16931 technical checks. Run offline batch preflight with pinned XSD and Schematron profiles before access-point submission. Inspect the bundled rule versions; validation does not submit invoices or guarantee network acceptance.

Parse Peppol BIS Billing UBL invoices and credit notes into stable JSON with document-level technical conformance findings. Transport is not included.

Preflight Romanian UBL Invoice and CreditNote XML against pinned UBL 2.1, CIUS-RO 1.0.1, and ro16931-ubl 1.0.9 rules.

Parse XRechnung UBL or CII XML into a stable EN 16931-oriented JSON contract with pinned technical conformance findings.

Validate XRechnung 3.0.x XML and ZUGFeRD 2.5 or Factur-X 1.09 XML/PDF with pinned rules and structured findings. Batch e-invoice validation and E-Rechnung Prüfung for accounts payable automation, Steuerberater workflows, ERP and einvoice pipelines via API, n8n, Make, or MCP agents.

Assess supported ZUGFeRD documents for XRechnung conversion, request missing business terms, and emit target XML only after pinned target validation passes.