Classifications used in the self-employed database are as follows:
- the French classification of  economic activities (NAF rev. 2, used at its finest level);
- the classification of legal categories (business legal status), also used at the most detailed level (level III);
- the classification of professions and socio-professional categories (PCS-ESE) for salaried positions held by self-employed is used at its most detailed level (level 3);
- the official geographical code used at the municipality level.

These classifications are also available under insee.fr.