Recoding was not carried out.
There is a mix of levels in vocational training (code 2), as it could be both low or medium.
Since 30 percent of the population is concerned, LIS decided not to recode.

If LIS users want to pursue a recode they may do so on their own responsability.
The mapping below may serve as suggestion. 
The problematic category is pointed out.

PEDUC							     ISCED97	   LIS recode
  0  children under 15, incomplete primary education				9
  1  primary completed								1
  2  vocational training without school leaving exam (sle)			1 or 2 ?
  3  lower secondary specialization without school leaving exam			1
  4  vocational training with school leaving exam (sle)				2
  5  upper secondary general with school leaving exam (sle)			2
  6  upper second. with specialization with school leaving exam			2
  7  lower tertiary, bachelor degree						3
  8  upper teritary (university, college)					3
  9  postgraduate								3