OptionaldataThe data field the line shows, by index into JSON.dataFields; absent, the first.
The item indexes after the repeated ones.
OptionalrepeatHow many leading items are the same as the line above's, and so not in items.
OptionaltypeAbsent: an item. default (or a subtotal function) for a subtotal, grand, blank.
One line of a laid-out pivot table's rows or columns: an item, a subtotal, the grand total, or a blank row, as Excel stores it in
rowItemsandcolItems.Remarks
A line names its items by index into each axis field's PivotFieldJSON.items, from the outermost field in; where the values sit, the index is a data field's. The first repeat of them are the line above's and are left out.