Description of problem:
We lack documentation on the internal fields that are available for our units. For example, the pkglist attribute or errata is not documented. Users don't have an easy way to find out which fields are available on our units, which makes it hard to know what information is available as well as which fields can be queried.

Version-Release number of selected component (if applicable):
2.4.0-1

How reproducible:
Every time!

Steps to Reproduce:
1. Go to the docs.
2. Try to find info about the attributes of our units.

Actual results:
You will feel sad and alone and without the knowledge you seek.

Expected results:
You should feel happy and knowledgeable!