Classify typed/bookmarked and referral traffic

Hi,

In some of our report suites, in our campaign reports (Campaign > Tracking code) we have a classification called Channel which captures the topline channels of our marketing activity like PPC, SEO, Email etc. These rules are set by the Classification Rule Builder. One of the topline channels is called Direct Traffic. Direct Traffic is a combination of typed/bookmarked traffic and all other referrer traffic (basically, all traffic without a tracking code).

This report suite was create about five years ago, before I joined the company, and the person who created it no longer works here. So, I am trying to figure out how they managed to classify traffic without a tracking code (there is no rule in the Classification Rule Builder for it). I've spoken to Adobe Customer Care and they've said it isn't possible, so I was hoping maybe someone in the community could help.

Thanks,

Frank