Cross Industry Invoice (CII)
The Cross Industry Invoice (CII) is a technical specification that can be used to create message syntax which can be exchanged globally between trading partners. Its was developed in UN/CEFACT with input from many business organizations, such as GS1, EUROFER, CIDX, EDIFICE, AIAG/ODETTE/JAMA, GHX, UK e-Government, UK HM Customs & Excise, and EDS. Like its paper version, it is an important accounting document, which has potential legal implications for sender and receiver.
The CII has over 2000 elements and so in most cases will have to be further restricted. An example of such a restriction is the CEN Core e-Invoice. Also some organizations use the CII Data Model and create their own syntax, for example the ISO 20022 Invoice.