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In parallel, the work on syntaxes is taking place: CEN TC 434 has a mandate from the standardisation request to review and assess a number of syntaxes against a set of criteria defined in the standardisation request itself, which includes the UN/CEFACT Cross Industry Invoice (CII) XML, the OASIS UBL 2.1 Invoice, the Financial Invoice based on the ISO 20022 methodology and other formats used in industry (e.g. EDIFACT).
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