[Timothycquinn]

I did not leverage any VBA or VB. I learned to code in VBA and written way too much code in that space and was well aware of the limitations.

I'm pretty sure the way it went was, on check-in of a new version, I had a Java program that read the spreadsheet validated that all the right sheets were there and that the columns on each sheet conformed with the spec and also validated rows of data. The sheets were translated on each front end node for easy access.

Regarding the expression engine, the the expressions themselves were then translated into TCL boolean expressions. The attributes for the related objects where already loaded into memory into dictionaries and then the expressions were just evaluated to get a boolean result.