Indicates the first PivotItem of the first group when the PivotItems of a PivotField have been grouped. Used in conjunction with GroupBy, GroupEnd, GroupStartAuto, GroupEndAuto, GroupType, ParentField and BaseField.
      
<GroupStart />
    | Element type | xsd:string | 
| Namespace | urn:schemas-microsoft-com:office:excel | 
| Schema name | XML Spreadsheet 2000 | 
| Element | Description | 
|---|---|
| PivotField | Contains information about a PivotField. | 
None.
None.
      
<xsd:element name="GroupStart" type="xsd:string" minOccurs="0" >
</xsd:element>