This is a really good explanation, and what's described here illustrates the primary reason I prefer the "key-value" approach over the simple "delimiter" approach. One additional step to consider including is a fallback value; this can alert you to instances where the key is set, but the value is not (i.e. it's empty). It's easy to implement because the order of execution of the Classification Rule Builder entries is reliable (i.e. top-to-bottom). The screenshot shows an extended version of the ...

@trevorpaulsen - interested to know which feature that's been added to Adobe Analytics Workspace in the last year or so you are convinced is most under-rated.Maybe one that you think hasn't received the attention it deserves or you think it might be misunderstood.