The Dutch Standaard Bedrijfsindeling (SBI 2008) is based on the activity classification of the European Union (Nomenclature statistique des activités économiques dans la Communauté Européenne, NACE) and on the classification of the United Nations (International Standard Industrial Classification of All Economic Activities, ISIC).
The first four digits of the SBI are the four digits of NACE and the first two digits of the SBI and NACE are the same as the first two digits of ISIC.
NACE Rev 2
ISIC Rev 4