Code for Occupation and Industry

CPS
1

I noticed that the code for OCC and IND have changed since 2007 for 3 times. If I want to compare all the data from 2007 till now, is there any universal code that can be used?

2

IPUMS CPS offers a number of harmonized occupation and industry variables that convert year-specific codes to a single coding scheme for occupation and industry respectively. These variables are OCC1950, OCC1990, and OCC2010 for occupation; the variables IND1950 and IND1990 are for industry.