YoMo provides tools to create and feed rpm repositories for yocto.
As a new feature, YoMo provides a new work flow for yocto SDK.
The SDK provided by YoMo can be managed by dnf (install new packages, update SDK, add new rpm repository, ...)
To use rpm repositories you need to have a http server.
You can find here some helpful documentation.
To use YoMo tools you need to build a yocto or an AGL image with some YoMo configuration.
You can find here some helpful documentation.
You can find here the YoMo documentation about rpm repositories creation.
You can find here the YoMo documentation about YoMo SDK.