BEAst: Only one Standard Item Number can be used per line. Peppol:

Namespace
cac urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2
Child elements
Card Name Description
1..1 cbc:ID

Item standard identifier
BEAst: Global Trade Item Number (T0154) or RSK Article Number Sweden (T6023). All other item number standards used within BEAst can not be used here until the organisation behind the standard decides to be a part of the codelist "ISO 6523 ICD". These are: NOBB Article Number (T6027), RT Article Number (T6460), TUN Article Number (T6028), Finfo/Vilma Article Number (T6029), Norwegian RSK Article Number (T6024), Norwegian E-number (T6026), E-number (T0260) and SGTIN (T6461). Peppol: An item identifier based on a registered scheme. Associates the item with its identification according to a standard system.

Example value: 1234567891234

0..1 cbc:ExtendedID

Item standard extended identifier
Peppol: with specific properties, e.g., Item 123 = Chair / Item 123 Ext 45 = brown chair.

Example value: 22114455

Rules
Identifier/Error message Flag
PEPPOL-T16-B16501
Element 'cbc:ID' MUST be provided.
fatal
PEPPOL-T16-B16502
Document MUST NOT contain elements not part of the data model.
fatal