Some people explain it as training in some specific vocation and others view it as combination of general education and vocational education.
The first view implies learning of some trade, skill of some vocation or occupation so as to enter the world of work just after the successful completion to the particular course according to the other view, vocational training which, in this narrow sense, is not correct.
Such educational courses must include general education courses also, besides training in the specific vocation so as to train the practical aptitudes of students in the preparation for definite vocational work later.