Support documentation in variables
Add a documentation field in the variables view: a column for "category", or "comments" (informational only). It would be nice to be able to see that a variable is for transforms, or is data that is passed on to an external application, etc, without having to dig through the process. This can be done to some extent with variable names. However, I don't want to be changing variable names down the road just to clarify their usage.