2.4.1 pivotTableReference
A pivotTableReference element is a CT_PivotTableReference type element, as specified in section 2.6.87, that specifies a PivotTable ([ISO/IEC29500-1:2016] section 18.10) part identifier for the workbook. The PivotTable specified by this element MUST be a Non-Worksheet PivotTable. See section 2.2.4.11 for how this element integrates with the Office Open XML file formats specified in [ISO/IEC29500-1:2016].