Industry/Profession on Relationship Entity?

I notice the Relationship entity has "is_primary business".


All good when paired with "name" (should return a member's employer).


"Position" is also on this entity - all good, again.


But I DON'T  see industry or profession endpoints -- critical for career networking functions.


Are these tucked away on some other entity?


I'm hoping I'm missing, as a work-around would be clunky (custom field).


Thanks, Tom