OptionaldataIndex into the pivot table's dataFields, indicating which data field this item represents.
OptionalitemIndices into each axis field's items array. Entries correspond positionally to the fields listed in rowFieldIndices (for row items) or colFieldIndices (for column items): entry i indexes into the i-th axis field's items.
When repeatedItemCount is greater than zero, the first that many entries are omitted (inherited from the previous PivotRowColItem), so the array starts at position repeatedItemCount.
OptionalitemThe type of this layout item (same enumeration as PivotFieldItem.itemType).
OptionalrepeatedThe number of leading axis positions whose itemIndices entries are omitted because they are identical to the previous PivotRowColItem's values (see PivotTable's type description for the level/axis model). The omitted entries are inherited from the preceding item in rowItems or colItems.
A layout item in the row or column area, describing what each row or column header represents.