The classification scheme for training specialisations currently in use is that approved by inter-ministerial decree No. 94-522 of June 21st 1994. Established within the framework of the French National Council for Statistical Information, the aim of the classification is to cover all forms of training, whatever the level: initial or continuing training, secondary or higher education, vocational or otherwise. The scheme contains 4 hierarchical levels of classification: level 4, level 17, level 100 and level 700. The central level of classification, known as the specialisation group, is level 100. Training courses at this level are assigned 3-digit codes (e.g. 234: carpentry and furniture-making).