value 0 field[0] attributedCredits fieldTest[0] NOTNULL

field[0] studentNumberFirst fieldTest[0] NULL field[1] studentNumberSecond fieldTest[1] NULL field[0] studentNumber fieldTest[0] NULL field[0] studentNumber fieldTest[0] NULL test (studentNumberFirst != null) and (*this* >= studentNumberFirst)

datePattern dd/MM/yyyy datePattern HH:mm datePattern dd/MM/yyyy datePattern HH:mm

datePattern dd/MM/yyyy datePattern HH:mm datePattern dd/MM/yyyy datePattern HH:mm