[yocto] How to include RPM database into target image?

[Alex J Lennon]

Presumably this is very obvious, apologies, but I can't track down the 
answer.

I'm building a distro based on Yocto for a Raspberry Pi but I don't seem 
to have
the RPM database / sample feeds installed on the target image.

Having hunted around and googled I can't spot the environment variable or
recipe I presumably need to set/include.

Can anybody advise?

Many Thanks,

Alex