These are the regular skills, as used in most public materials
Example of skill hierarchy:
Super Skill A
Meta Skill A.1
Meta Skill A.2
Skill list
Super Skil Name B
Meta Skill B.1
Skill list
...
The IDs of super-skills and meta-skills are returned in all Skill List APIs.
The Learning APIs return the atomic skills by default. For skill hierarchy responses the appropriate parameter needs to be used. More information is available on the related pages.