I've added some guidelines for what constitutes good Rule-writing to the
wiki at:
https://fedorahosted.org/scap-security-guide/wiki/newxccdf
(This is also linked from the main page in "How to Create a New Guidance
Item in XCCDF").
TLDR? Perhaps. But there are a few recent commits that provided
excellent content but which I may reformat to be consistent with these
guidelines.