It is a highly experimental replacement for yum [1], evolving from yum's code. It handles packages using rpm [2] libsolv [3] and hawkey [4] libraries.
[1] http://yum.baseurl.org/
[2] http://rpm.org/
[3] https://github.com/openSUSE/libsolv
[4] https://github.com/akozumpl/hawkey