Human resource entities not used in OFBiz or OpenTaps?

[Jonathon -- Improov]

I see the human resource entities (eg. PayGrade, Employment, etc), but I don't see any 
OFBiz/OpenTaps codes using it (searched with wide `grep').

Am I right to say that OFBiz/OpenTaps does not use the human resource entities (in folder 
application/humanres)? Those entities are simply there for us to build an application (say payroll 
or general human resource apps) on?

Jonathon