UN/CEFACT CII (Cross Industry Invoice) is an XML invoice schema developed by the United Nations Centre for Trade Facilitation and Electronic Business. It is one of the two XML syntaxes (alongside UBL 2.1) binding the EN 16931 European e-invoicing semantic data model.
ZUGFeRD and Factur-X both use the CII schema for their embedded XML attachment. The schema defines elements for trade parties, supply chain trade transactions, line items, tax breakdowns, and settlement data.
Key facts
- Published by UN/CEFACT (United Nations body)
- Namespace:
urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100 - Used in: ZUGFeRD, Factur-X, XRechnung (DE), EN 16931
- Alternative to UBL 2.1 for EN 16931 compliance