OptionalchartCharts embedded in the workbook; chart data is not extracted.
OptionalcommentSheets carrying cell comments/notes (not extracted).
OptionalexternalExternal-link parts (other workbooks, DDE, or OLE); linked cells carry last-cached values that may be stale.
OptionalhasThe workbook contains VBA macros.
OptionalpivotPivot tables; their computed views are not extracted.
Workbook-level parts the per-sheet CSV dump cannot express, counted from the container index so the summary can SAY what it cannot show (chart-locked figures, pivot views, staleness of external-workbook cached values). Every field is omitted when zero/false.