This documents specifies the mapping between the semantic model of an electronic invoice, included inEN 16931-1 and the ISO 9735 (UN/EDIFACT) syntax. For each element in the semantic model (includingsub-elements or supplementary components such as Identification scheme identifiers) it is defined whichelement in the syntax is to be used to contain its information contents. Any mismatches betweensemantics, format, cardinality or structure are indicated.