Conformance-validate a structured e-invoice extract against version-pinned Factur-X, XRechnung, PINT-AE, or MyInvois format rules: mandatory-field presence, currency/VAT-category codelist membership, and line-item cardinality. The caller supplies the already-extracted business-term fields (EN 16931 BT-style); this validator checks them against the pinned rule set. Zero network.
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Scope
Root node of the einvoice-validation-pipeline chain (art-293→294→295→296). Checks conformance only: this is not a legal-validity or tax-clearance determination. See einvoice-validation-pipeline chain.