ReadonlycolumnReadonlyviewIndex into a TableauRow — i.e. the column's position in the original view-order column list, dropped columns included. Dropping a column never shifts the columns after it.
ReadonlycaptionHuman-facing name: the aggregation wrapper unwrapped where possible.
ReadonlynumericWhether dataType is one of Tableau's numeric types.
ReadonlytemporalWhether the column carries a date or date-time.
ReadonlyroleOptional ReadonlyaggAggregation wrapper as written, e.g. SUM. Absent on a bare numeric.
A column read as a value: what the pitch and the numbers come from.