cbc:DocumentType
The type of reference that cannot be specified by a code. At least one of Document Type Code and Document Type must be used.
- Namespace
 cbcurn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2- Data type
 - Text
 - udt:TextType
 - Example value
 FreightPayersCustomerNumber- Business terms
 - tir16-p050
 - Rules
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Identifier/Error message Flag PEPPOL-T120-R031 
AdditionalDocumentReference SHALL contain a Document Type Code or a Document Type.fatal