Danish ERSTORG number (SE) MUST be stated in the correct format.
cbc:EndpointID[@schemeID = '0198'] | cac:PartyIdentification/cbc:ID[@schemeID = '0198'] | cbc:CompanyID[@schemeID = '0198'](string-length(string()) = 10 and substring(string(), 1, 2) = 'DK' and string-length(translate(substring(string(), 3, 8), '1234567890', '')) = 0)