others have done something this well (afair)
I have some .csv files with two columns: timestamp, measure and a panoply of operators (some go to timestamp, others to measures).
I hope to provide a welcome and performant way for others to specify (name, save, edit, and use then store) their preferred succession of operators/mappings along with the source+sink of choice.
More than one applicative sequence may be engaged (each with its own view of the data) and there must be a way to combine their respective determinations / values when each is done. This combining is done following “the rest of”/“another, linked” preferred succession.