I'm not seeing a way to do this, but just wanted to check first. And I'm just trying to work around a backlog of IT resources... So is it possible to do regular expressions within a processing rule? As an example, I basically would want to do something like this one where I could pull out the third ...

The fact that you can't do multiple dimensions side-by-side in the interface. Not only is it way more effort to breakdown every element, but if the data is large enough, you also have to scroll forever to see the data and visually determine which element is larger/smaller between all the breakdowns....

Thanks. I followed your screenshot and got it to work. Well to function. The numbers are less correct then the basic segment. I can always provide the marketing team with filtered reports though. I was just hoping to clean up the view a bit if I could. 

Description - Apply attribution models to Data Warehouse exportsWhy is this feature important to you - So that we have an ability to automatically export approved data to vendors with the appropriate attribution in view.How would you like the feature to work - Be able to do attribution on metrics in...

@fwachsmuth this is a great workaround for dimensions which don't expect new values. Thanks for the tip.

This is a great idea. Somewhat related, it would be great if we could apply attribution criteria to segments as well. I'm attempting to create sequential segments using within time frame criteria, but it doesn't seem to be giving me what I would like. A much simpler option would be much appreciated.