Aliases
Alternative names for tags. The 'human' way of describing process measurement or instrument data (e.g. 'pH', 'dO2').
Tags
A process measurement or instrument data. Typically some gibberish nomenclature created by control engineers. To PI, this is where to archive historical data (timestamp-value pairs).
Units
'Where' process step happens. This is identical to the "Unit Operation" concept taught in Chemical Engineering.
UnitBatches
TimeWindows of activity that happen on a unit.
