I wanted to point out that I wasn't really trying to use this idea to version database tables -- I am trying to store datapoints that change over time (like pul

I wanted to point out that I wasn't really trying to use this idea to version database tables -- I am trying to store datapoints that change over time (like pulse rate, temperature, pressures, etc.) and have a specific well-known key. Basically, a 3-dimensional Excel spreadsheet.