Danish organization number (CVR) MUST be stated in the correct format.
cbc:EndpointID[@schemeID = '0184'] | cac:PartyIdentification/cbc:ID[@schemeID = '0184'] | cbc:CompanyID[@schemeID = '0184']
(string-length(string()) = 10 and substring(string(), 1, 2) = 'DK' and string-length(translate(substring(string(), 3, 8), '1234567890', '')) = 0) or (string-length(string()) = 8) and (string-length(translate(substring(string(), 1, 8),'1234567890', '')) = 0)