errata appears to be correct upon inspecting the code.

Now the bad news: I don't think it actually obeys the other skip things that its code docs said it did. As far as I can tell from inspecting the code, only "rpm", "errata", and "distribution" are honored as parameters to skip. So no drpm, packagegroup (or package_group), srpm, or packagecategory (or package_category) seem to be honored.

This code is so hard to follow, so I'll poke around a bit more, but unless the other skip values are evaluated in a different module than the ones that these three are evaluated in, I believe that they are not honored.