Not sure if this is the right place to ask this, but I'll give it a shot. I'm working my way through the videos, so if this is mentioned elsewhere, forgive me. In setting up an expression, I want to use a tag that isn't necessarily a part of the attributes for the template. I'll detail out my example.
I have a building that uses steam, chill water and electricity, all of which we meter. I have a building template that has some basic information about the building, and under that I have templates for each of the services, and those are where the attributes exist. These services are going to change depending on the outside conditions, so I monitor my wet bulb temperature, but that attribute isn't necessarily in the Steam template, nor is it necessarily in the building template. In the variable expressions field, how do I reference an "attribute", that isn't a part of that specific template? Is it possible? Am I going to be required to bring the wetbulb temperature into every single template just so I can use it in the analysis?