Group entry, 12 entries planned.
The four levels of ISCO-08
Major, sub-major, minor, and unit groups, how the four levels nest, and how to read a four-digit code.
- How do correspondence tables work in ISCO-08?
Correspondence tables for ISCO-08 from the ILO map groups in one classification to groups in another, so figures can be compared across systems.
- How do the four levels of ISCO-08 nest?
ISCO-08 from the ILO nests each narrower group inside exactly one broader group, from major group down to unit group.
- How do you move from a broad group to a detailed group without guessing?
Moving from a broad ISCO-08 group to a detailed group from the ILO means narrowing step by step through definitions and notes, checking each level.
- How do you read a four-digit ISCO-08 code?
To read an ISCO-08 code from the ILO, read it left to right, with each digit adding a narrower level inside the group before it.
- How many groups are at each level of ISCO-08?
ISCO-08 from the ILO has 10 major, 43 sub-major, 130 minor, and 436 unit groups, with more groups at each narrower level.
- What is a major group?
In ISCO-08 from the ILO, a major group is the broadest tier, a one digit family that gathers related work before any finer split.
- What is a minor group?
In ISCO-08 from the ILO, a minor group is the third tier, a three digit division that narrows a sub-major family toward detailed occupations.
- What is a sub-major group?
ISCO-08 from the ILO places sub-major groups at the second tier, two digit divisions that split each major group into smaller families.
- What is a unit group?
ISCO-08 from the ILO uses unit groups as its finest tier, 436 four digit groups that give the most detailed occupation classification.
- What is an explanatory note in ISCO-08?
An explanatory note in ISCO-08 from the ILO is the published text that clarifies what a group includes, excludes, and how its boundary is drawn.
- What is an index of occupational titles?
In ISCO-08 from the ILO, an index of occupational titles is an alphabetical finding aid that points job titles toward relevant unit groups.
- Why does ISCO-08 use 1, 2, 3 and 4 digit codes?
ISCO-08 from the ILO uses codes of different lengths because different questions need different levels of detail, from broad totals to unit groups.