Peppol: An identifier issued by an official registrar that identifies the Seller as a legal entity or person. In order for the buyer to automatically identify a supplier, the Seller identifier (BT-29), the Seller legal registration identifier (BT-30) and/or the Seller VAT identifier (BT-31) shall be present

Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Identifier
udt:IdentifierType
Example value
5561043539
Business terms
BT-30
Attributes
Use Name Description
O @schemeID

Seller legal registration identifier identification scheme identifier
Peppol: The identification scheme identifier of the Seller legal registration identifier.

Example value: 0007

Rules
Identifier/Error message Flag
BR-CO-26
[BR-CO-26]-In order for the buyer to automatically identify a supplier, the Seller identifier (BT-29), the Seller legal registration identifier (BT-30) and/or the Seller VAT identifier (BT-31) shall be present. 
fatal
BR-CL-11
[BR-CL-11]-Any registration identifier identification scheme identifier MUST be coded using one of the ISO 6523 ICD list.
fatal
DK-R-002
Danish suppliers MUST provide legal entity (CVR-number)
fatal
DK-R-014
For Danish Suppliers it is mandatory to specify schemeID as "0184" (DK CVR-number) when PartyLegalEntity/CompanyID is used for AccountingSupplierParty
fatal
SE-R-003
Swedish organisation numbers should be numeric.
warning
SE-R-004
Swedish organisation numbers consist of 10 characters.
warning