Units registered in REE-Sirene are legally registered productive and market units, and all associated establishments, conducting real economic activity in the following sectors: manufacturing, construction, trade and market services. Excluded from the demographic data for enterprises and establishments are :
 · registered units active in agriculture, forestry and fishing (divisions " 01 " to " 03 " classified under NAF rév.2, 2008);
 · registered units whose functioning is supported by non-commercial activity (administrations, local authorities, social organizations and non-commercial associations).
The non-agricultural business sector is comprised of all legally registered units:
- conducting real economic activity, i.e. market and productive;
- whose principal activity is in manufacturing, construction, trade and market services (excluding agriculture).